FR2909131A1 - Piston stroke limiting device for e.g. combustion engine, has piston driving another piston along their longitudinal axis during displacement of former piston, and stopper immobilizing latter piston during displacement of latter piston - Google Patents

Piston stroke limiting device for e.g. combustion engine, has piston driving another piston along their longitudinal axis during displacement of former piston, and stopper immobilizing latter piston during displacement of latter piston Download PDF

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Publication number
FR2909131A1
FR2909131A1 FR0610303A FR0610303A FR2909131A1 FR 2909131 A1 FR2909131 A1 FR 2909131A1 FR 0610303 A FR0610303 A FR 0610303A FR 0610303 A FR0610303 A FR 0610303A FR 2909131 A1 FR2909131 A1 FR 2909131A1
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France
Prior art keywords
piston
cylinder
during displacement
displacement
chamber
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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.)
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FR0610303A
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French (fr)
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Joel Roger Jean Gueraud
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Individual
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Individual
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Priority to FR0610303A priority Critical patent/FR2909131A1/en
Publication of FR2909131A1 publication Critical patent/FR2909131A1/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00Other engines
    • F02B75/04Engines with variable distances between pistons at top dead-centre positions and cylinder heads
    • F02B75/044Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of an adjustable piston length
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00Other engines
    • F02B75/28Engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders
    • F02B75/30Engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders with one working piston sliding inside another
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/26Control
    • F04B1/28Control of machines or pumps with stationary cylinders
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/12Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members
    • F04B49/14Adjusting abutments located in the path of reciprocation

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

The device has a piston (8), which caps another piston (1) such that the piston (1) drives the piston (8) along their longitudinal axis during displacement of the piston (1). An adjustable stopper (10) immobilizes the piston (8) during displacement of the piston (8) in a cylinder (3A). The pistons sliding with respect to each other define a closed volume (12) between each other, where the volume acquaints capacity variation.

Description

-1- 1 La présente invention concerne un dispositif pour régler la courseThe present invention relates to a device for adjusting the race

d'un piston à déplacement linéaire d'un moteur, d'un compresseur, d'une pompe pour permettre le réglage de sa cylindrée. Le réglage de la cylindrée des moteurs à pistons linéaires est traditionnellement effectué par le rapprochement du corps du cylindre au point d'entraînement de la tige de piston ; le réglage de la cylindrée des pompes est traditionnellement effectué par la modification de l'inclinaison du dispositif d'entraînement sur lequel prend appui la tige de piston lors de la compression et auquel il est retenu lors de la phase d'aspiration, de telle sorte que la course du piston correspond à la course développée par le déplacement du point d'appui (tirage/poussée) dudit piston. Ces modifications de positionnements de corps de cylindres ou de plaque d'appui se faisant lorsque les chambres de cylindres sont sous pression nécessitant certains efforts. Le dispositif selon l'invention permet de remédier à cet inconvénient. Il comporte en effet selon une première caractéristique, un second piston (8) qui coiffe le premier (1) de telle sorte que lors du déplacement de ce dernier (1), il entraîne ce deuxième piston (8) suivant leur axe longitudinal. Ce piston (8) qui détermine le volume de la chambre (4) est arrêté à volonté par une butée réglable (10) appartenant au carter (3) lors de la phase de sortie en dehors du cylindre (3A); ainsi, lorsque le piston (8) est arrêté dans son cylindre (3A) il prédétermine le volume (4) de la chambre active alors que le premier piston (1) attelé à son dispositif d'entraînement (7 ou 15/15A) effectue sa course intégrale correspondant à la course développée par le déplacement du point d'appui (tirage/poussée) dudit piston; lors de sa phase positive le piston (1) attelé (2) à son mode d'entraînement (7) (15/15A) repousse le deuxième piston (8) lorsque la chambre (4) constituée entre les deux pistons (8) (1) est incompressible. Cette immobilisation du piston (8) se faisant lorsque la chambre du cylindre n'est plus sous pression nécessite très peu d'efforts. Selon des modes particuliers de réalisation : - Le piston (8) qui coiffe le piston (1) est entraîné par ce dernier par effet de dépression créé dans la chambre 11/12/13 ainsi constituée entre les deux pistons. Le piston (8) qui coiffe le piston (1) est entraîné par ce dernier par effet de pression créé dans la chambre (16) constituée entre la tige d'entraînement (17) et le piston (8). - Un tube télescopique (18) assure la continuité de circulation du fluide comprimé 35 dans la chambre (4) de manière à assurer la lubrification de la tête de poussée (19) sur la plaque d'appui (20). 2909131 -2- 1 Les dessins annexés illustrent l'invention : La figure 1 représente un piston de moteur à combustion où le piston actif (8, 8A) coiffe le piston (1) attelé à son mode d'entraînement (2) (7), la butée réglable (10) pouvant immobiliser le piston actif lors de sa sortie du cylindre (3A) sous l'effet de dépression dans la chambre (4) constituée entre le piston (1) et le piston (8).  a linear displacement piston of an engine, a compressor, a pump to allow the adjustment of its displacement. The adjustment of the displacement of linear piston engines is traditionally carried out by bringing the cylinder body closer to the driving point of the piston rod; the adjustment of the displacement of the pumps is traditionally carried out by modifying the inclination of the driving device on which the piston rod bears during compression and to which it is retained during the suction phase, so that that the stroke of the piston corresponds to the stroke developed by the displacement of the fulcrum (pulling / pushing) of said piston. These changes of cylinder body positioning or support plate being made when the cylinder chambers are under pressure requiring certain efforts. The device according to the invention overcomes this disadvantage. It comprises in fact according to a first characteristic, a second piston (8) which caps the first (1) so that during the movement of the latter (1), it drives the second piston (8) along their longitudinal axis. This piston (8) which determines the volume of the chamber (4) is stopped at will by an adjustable stop (10) belonging to the housing (3) during the exit phase outside the cylinder (3A); thus, when the piston (8) is stopped in its cylinder (3A) it predetermines the volume (4) of the active chamber while the first piston (1) coupled to its driving device (7 or 15 / 15A) performs its integral race corresponding to the race developed by the displacement of the fulcrum (pulling / pushing) of said piston; during its positive phase the piston (1) coupled (2) to its drive mode (7) (15 / 15A) pushes the second piston (8) when the chamber (4) formed between the two pistons (8) ( 1) is incompressible. This immobilization of the piston (8) occurring when the cylinder chamber is no longer under pressure requires very little effort. According to particular embodiments: - The piston (8) which caps the piston (1) is driven by the latter by the effect of depression created in the chamber 11/12/13 thus formed between the two pistons. The piston (8) which caps the piston (1) is driven by the latter by pressure effect created in the chamber (16) formed between the drive rod (17) and the piston (8). - A telescopic tube (18) ensures the continuity of circulation of the compressed fluid 35 in the chamber (4) so as to ensure the lubrication of the thrust head (19) on the support plate (20). The accompanying drawings illustrate the invention: FIG. 1 shows a combustion engine piston in which the active piston (8, 8A) caps the piston (1) coupled to its driving mode (2) (7). ), the adjustable stop (10) can immobilize the active piston when it leaves the cylinder (3A) under the effect of depression in the chamber (4) formed between the piston (1) and the piston (8).

5 La Figure 2 représente un piston de pompe/compresseur où le piston actif (8) est entraîné par le piston entraîneur (1) sous un effet de dépression créé entre les deux pistons dans la chambre (4) constituée entre le piston (1) et le piston (8). La Figure 3 représente un piston de pompe/compresseur où le piston actif (8) est entraîné par le piston entraîneur (1) sous un effet de pression créé entre les deux 10 pistons dans la chambre (16) constituée entre la tige de piston (17) et le corps de cylindre (8). La figure 4 représente un piston de pompe/compresseur où le piston actif (8) entraîné par le piston entraîneur (1) constitue un tube télescopique (18) assurant la circulation de fluide entre la chambre (4) et la rotule de tête (19) d'entraînement du 15 dispositif prenant appui sur sa plaque de poussée (20) afin d'en assurer sa lubrification. En référence à ces dessins, le dispositif comprend un piston (8) à déplacement linéaire comportant au moins un élément de piston pouvant être placé dans un carter (3) de 20 manière à pouvoir effectuer un mouvement longitudinal et pouvant être manoeuvré par un dispositif d'entraînement (2). La chambre d'aspiration/compression (4) peut être reliée soit à une zone d'aspiration par l'intermédiaire d'un dispositif de soupape d'admission (5) soit à une zone de refoulement par l'intermédiaire d'un dispositif de soupape d'échappement (6).FIG. 2 shows a pump / compressor piston where the active piston (8) is driven by the driving piston (1) under a vacuum effect created between the two pistons in the chamber (4) formed between the piston (1). and the piston (8). FIG. 3 shows a pump / compressor piston where the active piston (8) is driven by the driving piston (1) under a pressure effect created between the two pistons in the chamber (16) formed between the piston rod ( 17) and the cylinder body (8). FIG. 4 shows a pump / compressor piston in which the active piston (8) driven by the driving piston (1) constitutes a telescopic tube (18) ensuring the circulation of fluid between the chamber (4) and the head ball (19). ) of the device bearing on its thrust plate (20) to ensure its lubrication. With reference to these drawings, the device comprises a linear displacement piston (8) having at least one piston element which can be placed in a housing (3) in such a way as to be capable of longitudinal movement and which can be operated by means of a device training (2). The suction / compression chamber (4) can be connected to either a suction zone via an inlet valve device (5) or to a discharge zone via a device exhaust valve (6).

25 La présente invention caractérisée en ce que le piston (8) constituant la tête active (8A) est rattaché au dispositif d'entraînement (7) (15/15A) par l'intermédiaire d'un deuxième piston (1) coulissant à l'intérieur du piston (8), de telle sorte que le piston (8) entraîné suivant son axe longitudinal par le piston (I) peut être immobilisé à 30 volonté lors de sa sortie du cylindre (3A) par la butée (10) de manière à prédéterminer le volume dans la chambre (4) du cylindre (3A) définissant ainsi le volume à comprimer, ce dispositif constituant une cylindrée réglable de la chambre (4) du cylindre indépendamment de la course du dispositif d'entraînement (7) (2) ; Lors de sa phase positive le piston (1) attelé à son mode d'entraînement (7) (15/15A) repousse le deuxième piston (8) lorsque la chambre (4) constituée entre les deux pistons (8) (1) est incompressible. 5 2909131 -3- 1 La tige d'entraînement (15A) du piston (1) constitue un vérin double effet entraînant ledit piston (8) par effet de compression créé dans la chambre (16). La tige d'entraînement (15A) du piston (1) entraîne le piston (8) par effet de dépression créé dans la chambre (16). Lesdits volumes (11/12/13/16) sont raccordés par un système de distribution aux réseaux fluides qui assurent leur admission à volonté. Le piston (8) peut être arrêté à volonté par une butée (9) réglable appartenant au carter 10 (3) lors de sa rentrée dans le cylindre (3A), déterminant le volume (4) du cylindre dans lequel il se déplace, indépendamment de la course du piston (1) entraîné par son moyen d'entraînement (7 ou 15/15A) Le dispositif selon l'invention est particulièrement destiné à réduire la cylindrée des 15 moteurs, compresseurs, pompes . 20 25 30 35The present invention is characterized in that the piston (8) constituting the active head (8A) is attached to the driving device (7) (15 / 15A) via a second piston (1) sliding on the the piston (8), so that the piston (8) driven along its longitudinal axis by the piston (I) can be immobilized at will when it leaves the cylinder (3A) by the stop (10). in order to predetermine the volume in the chamber (4) of the cylinder (3A) thus defining the volume to be compressed, this device constituting an adjustable displacement of the chamber (4) of the cylinder independently of the stroke of the drive device (7) ( 2); During its positive phase the piston (1) coupled to its driving mode (7) (15 / 15A) pushes the second piston (8) when the chamber (4) formed between the two pistons (8) (1) is incompressible. The driving rod (15A) of the piston (1) constitutes a double-acting cylinder driving said piston (8) by compression effect created in the chamber (16). The driving rod (15A) of the piston (1) drives the piston (8) by depression effect created in the chamber (16). Said volumes (11/12/13/16) are connected by a distribution system to the fluid networks which ensure their admission at will. The piston (8) can be stopped at will by an adjustable stop (9) belonging to the casing (3) when it enters the cylinder (3A), determining the volume (4) of the cylinder in which it moves, independently the piston stroke (1) driven by its drive means (7 or 15 / 15A) The device according to the invention is particularly intended to reduce the displacement of engines, compressors, pumps. 20 25 30 35

Claims (10)

REVENDICATIONS 1 1) dispositif pour limiter la course d'un piston à déplacement linéaire caractérisé en ce qu'il comporte un piston (8) qui coiffe un second piston (1) qui coulisse en lui constituant un piston télescopique (8/1) connaissant un déplacement simultané relatif dans le cylindre (3A) suivant leur axe longitudinal lors du déplacement du piston (1) entraîné par son moyen d'entraînement (7 ou 15/15A), une butée réglable (10) immobilisant le piston (8) au cours de son déplacement dans le cylindre (3A).  1 1) device for limiting the stroke of a piston linear displacement characterized in that it comprises a piston (8) which caps a second piston (1) which slides in constituting a telescopic piston (8/1) knowing a relative simultaneous displacement in the cylinder (3A) along their longitudinal axis during the displacement of the piston (1) driven by its driving means (7 or 15 / 15A), an adjustable stop (10) immobilizing the piston (8) during of its displacement in the cylinder (3A). 2) dispositif selon la revendication 1 caractérisé en ce que le piston (8) peut être arrêté à volonté par une butée (10) réglable appartenant au carter (3) lors de sa sortie du cylindre (3A), déterminant le volume (4) du cylindre dans lequel il se déplace, indépendamment de la course du piston (1) entraîné par son moyen d'entraînement (7 ou 15/15A).  2) Device according to claim 1 characterized in that the piston (8) can be stopped at will by an adjustable stop (10) belonging to the housing (3) when it leaves the cylinder (3A), determining the volume (4) of the cylinder in which it moves, regardless of the stroke of the piston (1) driven by its drive means (7 or 15 / 15A). 3) dispositif selon la revendication 2 caractérisé en ce que les deux pistons (8) (1) coulissant l'un dans l'autre délimitent entre eux un volume fermé (12) connaissant des variations de cylindrée.  3) Device according to claim 2 characterized in that the two pistons (8) (1) sliding one in the other delimit between them a closed volume (12) knowing variations in displacement. 4) Dispositif selon la revendication 3 caractérisé en ce que le volume (12) contient un fluide (13) connaissant des variations de pression.  4) Device according to claim 3 characterized in that the volume (12) contains a fluid (13) experiencing pressure variations. 5) Dispositif selon les revendications 3, 4 caractérisé en ce que la tige d'entraînement (15A) du piston (1) constitue un vérin simple effet entraînant ledit piston (8) par effet de dépression créée dans la chambre (11/12/13) ainsi constituée.  5) Device according to claims 3, 4 characterized in that the driving rod (15A) of the piston (1) is a single acting jack driving said piston (8) by depression effect created in the chamber (11/12 / 13) thus constituted. 6) Dispositif selon les revendications 3, 4 caractérisé en ce que la tige d'entraînement (15A) constitue un vérin simple effet entraînant ledit piston (8) par effet de compression créée dans la chambre (11/12/13) ainsi constituée.  6) Device according to claims 3, 4 characterized in that the drive rod (15A) is a single acting jack driving said piston (8) by compression effect created in the chamber (11/12/13) thus formed. 7) Dispositif selon la revendication 4 caractérisé en ce que la tige d'entraînement (15A) du piston (1) constitue un vérin double effet entraînant ledit piston (8) par effet de compression créé dans la chambre (16) ainsi constituée.  7) Device according to claim 4 characterized in that the drive rod (15A) of the piston (1) is a double-acting jack driving said piston (8) by compression effect created in the chamber (16) thus formed. 8) Dispositif selon la revendication 7 caractérisé en ce que la tige d'entraînement (15A) du piston (1) entraîne le piston (8) par effet de dépression créé dans la chambre (16) ainsi constituée.  8) Device according to claim 7 characterized in that the drive rod (15A) of the piston (1) drives the piston (8) by depression effect created in the chamber (16) thus formed. 9) Dispositif selon l'une quelconque des revendications 3 à 8 caractérisé en 30 ce que lesdits volumes (11/12/13/16) ainsi constitués sont raccordés par un système de distribution aux réseaux fluides qui assurent leur admission à volonté.  9) Device according to any one of claims 3 to 8 characterized in that said volumes (11/12/13/16) thus formed are connected by a distribution system to the fluid networks which ensure their admission at will. 10) Dispositif selon la revendication 1 à 9 caractérisé en ce que le piston (8) peut être arrêté à volonté par une butée (9) réglable appartenant au carter (3) lors de sa rentrée dans le cylindre (3A), déterminant le volume (4) du cylindre dans lequel il se 35 déplace, indépendamment de la course du piston (1) entraîné par son moyen d'entraînement (7 ou 15/15A)  10) Device according to claim 1 to 9 characterized in that the piston (8) can be stopped at will by an adjustable stop (9) belonging to the housing (3) when it enters the cylinder (3A), determining the volume (4) of the cylinder in which it moves, independently of the stroke of the piston (1) driven by its drive means (7 or 15 / 15A)
FR0610303A 2006-11-24 2006-11-24 Piston stroke limiting device for e.g. combustion engine, has piston driving another piston along their longitudinal axis during displacement of former piston, and stopper immobilizing latter piston during displacement of latter piston Withdrawn FR2909131A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0610303A FR2909131A1 (en) 2006-11-24 2006-11-24 Piston stroke limiting device for e.g. combustion engine, has piston driving another piston along their longitudinal axis during displacement of former piston, and stopper immobilizing latter piston during displacement of latter piston

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0610303A FR2909131A1 (en) 2006-11-24 2006-11-24 Piston stroke limiting device for e.g. combustion engine, has piston driving another piston along their longitudinal axis during displacement of former piston, and stopper immobilizing latter piston during displacement of latter piston

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FR2909131A1 true FR2909131A1 (en) 2008-05-30

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FR0610303A Withdrawn FR2909131A1 (en) 2006-11-24 2006-11-24 Piston stroke limiting device for e.g. combustion engine, has piston driving another piston along their longitudinal axis during displacement of former piston, and stopper immobilizing latter piston during displacement of latter piston

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FR (1) FR2909131A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108397374A (en) * 2018-03-19 2018-08-14 王文月 A kind of transfiguration method of compressor of air conditioner
WO2019046951A1 (en) * 2017-09-08 2019-03-14 University Of Ontario Institute Of Technology Engine with at least one of non-sinusoidal motion and embedded pistons

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE110382C (en) *
US1386114A (en) * 1919-10-24 1921-08-02 Jedrzykowski Edmund Internal-combustion engine
EP0297903A2 (en) * 1987-07-03 1989-01-04 Honda Giken Kogyo Kabushiki Kaisha Compression ratio-changing device for internal combustion engines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE110382C (en) *
US1386114A (en) * 1919-10-24 1921-08-02 Jedrzykowski Edmund Internal-combustion engine
EP0297903A2 (en) * 1987-07-03 1989-01-04 Honda Giken Kogyo Kabushiki Kaisha Compression ratio-changing device for internal combustion engines

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019046951A1 (en) * 2017-09-08 2019-03-14 University Of Ontario Institute Of Technology Engine with at least one of non-sinusoidal motion and embedded pistons
US11384639B2 (en) 2017-09-08 2022-07-12 University Of Ontario Institute Of Technology Engine with at least one of non-sinusoidal motion and embedded pistons
CN108397374A (en) * 2018-03-19 2018-08-14 王文月 A kind of transfiguration method of compressor of air conditioner
CN108397374B (en) * 2018-03-19 2019-06-18 中徽机电科技股份有限公司 A kind of transfiguration method of compressor of air conditioner

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