FR2981698A1 - Device for guiding piston of internal combustion heat engine, has sliding-door fixed under piston by rivets, welding and screws or directly fixed under piston, where door is equipped in lower part of two rings parallel to piston or cylinder - Google Patents
Device for guiding piston of internal combustion heat engine, has sliding-door fixed under piston by rivets, welding and screws or directly fixed under piston, where door is equipped in lower part of two rings parallel to piston or cylinder Download PDFInfo
- Publication number
- FR2981698A1 FR2981698A1 FR1103204A FR1103204A FR2981698A1 FR 2981698 A1 FR2981698 A1 FR 2981698A1 FR 1103204 A FR1103204 A FR 1103204A FR 1103204 A FR1103204 A FR 1103204A FR 2981698 A1 FR2981698 A1 FR 2981698A1
- Authority
- FR
- France
- Prior art keywords
- piston
- door
- fixed under
- cylinder
- internal combustion
- 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.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/32—Engines characterised by connections between pistons and main shafts and not specific to preceding main groups
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B9/00—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts, not specific to groups F01B1/00 - F01B7/00
- F01B9/02—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts, not specific to groups F01B1/00 - F01B7/00 with crankshaft
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- 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
- F02B75/06—Engines with means for equalising torque
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
Description
- 1 - 1 Guide piston pour moteurs thermiques alternatifs. La présente invention s'applique aux pistons des moteurs thermiques alternatifs à combustion interne à deux temps où quatre temps. - 1 - 1 piston guide for reciprocating engines. The present invention applies to pistons of internal combustion engines with two-stroke or four-stroke internal combustion engines.
Sur un moteur à combustion interne actuel, la recherche de puissance passe (pour une même cylindrée considérée) par une augmentation de l'alésage afin d'obtenir une course plus courte favorisant la vitesse de rotation et donc la multiplication des temps moteurs (explosions) et par la même de la puissance, tout en augmentant aussi peu que possible la vitesse linéaire du piston au delà des valeurs compatibles avec l'état actuel de la métallurgie et des éventuels traitements thermiques associés. soit aujourd'hui environ 25 m/s (cas des moteurs dit "carrés" et "super-carrés"). Cette architecture nécessite donc des pistons à fort diamètre mais à faible hauteur de jupe pour ne pas en affecter le poids, mais entraîne une forte inclinaison de la bielle à la mi-course, occasionnant une rapide usure de l'ensemble cylindre/piston. Le système selon l'invention consiste à répartir la fonction de guidage ordinairement dévolue uniquement à la jupe du piston en ajoutant un "porte- coulisseaux"(3) réalisé dans un matériau aussi léger que possible (aluminium, téflon) fixé rigidement sous la calotte du piston (1) par son extrémité haute au niveau du pied de bielle (2). Ce "porte-coulisseaux" (3) comporte à ses extrémités basses deux bagues cylindriques (8) parallèles à l'axe du (des) cylindre(s) (6) coulissant chacune sur deux guides (4) rigides fixés parallèlement à l'axe du (des) cylindre(s)(6) dans les carters moteurs (7). Deux cas sont possibles, soit un moteur classique ne comportant qu'une seule bielle (2) par cylindre/piston (1)(6), auquel cas le "porte-coulisseaux" (3) est dédoublé pour "encager" l'unique 30 bielle (2) sans entraver son mouvement. (figures de 1/16 à 8/16) Soit le moteur dispose de deux bielles (2) juxtaposées par cylindre/piston (6)(1) ce qui permet d'adopter "un porte-coulisseaux" (3) simple, passant entre les deux bielles (2). (figures de 9/16 à 16/16). 35 On constate donc que les surfaces de guidage se trouvent aux - 2 - 1 extrémités du dispositif, d'une part la jupe du piston dans la partie haute, réduite à un simple "porte segments" (si le moteur en comporte) et d'autre part les deux bagues (8) du "porte-coulisseaux" (3) dans la partie basse. L'espacement de ses deux surfaces de guidages pouvant aisément atteindre la valeur de l'alésage on obtient une bonne maitrise des forces longitudinales générées par les mouvements de la où des bielle(s) (2) et donc un meilleur guidage du piston (1). On a current internal combustion engine, the search for power passes (for the same cylinder considered) an increase in the bore to obtain a shorter stroke favoring the speed of rotation and therefore the multiplication of engine times (explosions) and by the same power, while increasing as little as possible the linear velocity of the piston beyond the values compatible with the current state of the metallurgy and any associated heat treatments. today is about 25 m / s (the case of so-called "square" and "super-square" engines). This architecture therefore requires pistons with large diameter but low skirt height to not affect the weight, but causes a steep inclination of the rod at the halfway, causing a rapid wear of the cylinder / piston assembly. The system according to the invention consists in distributing the guiding function ordinarily assigned solely to the skirt of the piston by adding a "slider" (3) made of a material as light as possible (aluminum, Teflon) rigidly fixed under the cap piston (1) by its high end at the small end (2). This "slider carrier" (3) has at its low ends two cylindrical rings (8) parallel to the axis of the (the) cylinder (s) (6) each sliding on two rigid guides (4) fixed parallel to the axis of the cylinder (s) (6) in the crankcases (7). Two cases are possible, ie a conventional engine having only one connecting rod (2) per cylinder / piston (1) (6), in which case the "slider carrier" (3) is split to "encage" the unique 30 connecting rod (2) without hindering its movement. (Figures 1/16 to 8/16) Either the engine has two rods (2) juxtaposed per cylinder / piston (6) (1) which allows to adopt "a carrier-slides" (3) simple, passing between the two connecting rods (2). (Figures 9/16 to 16/16). It can therefore be seen that the guide surfaces are located at one end of the device, on the one hand the skirt of the piston in the upper part, reduced to a simple "segment door" (if the engine has them) and the other two rings (8) of the "slider holder" (3) in the lower part. The spacing of its two guide surfaces can easily reach the value of the bore is obtained a good control of the longitudinal forces generated by the movements of the rod (s) (2) and therefore a better guidance of the piston (1). ).
Le "porte-coulisseaux" (3) en question doit pouvoir travailler de sorte à ne pas entrée en contact avec la base du cylindre (6) lorsque le piston (1) (auquel il est fixé) est au point mort haut d'une part et ne pas entrée en contact dans sa partie centrale basse avec le maneton lorsque le piston (1) est à mi-course (90°), (position où 15 la (les) bielle(s) par son (leur) inclinaison maximum offre(nt) sa (leur) plus faible distance géométrique projetée entre l'axe du pied de bielle et l'axe de la tête de bielle). Par ailleurs, il doit permettre à la (aux) bielle(s) (2) de se mouvoir librement (sans contact) dans le sens longitudinal et donc de respecter un espace minimal 20 mais suffisant avec les deux guides rigides (4) fixés parallèlement à l'axe du (des) cylindre(s)(6) dans les carters moteurs (7). (figures 7/16 et 15/16). The "slider carrier" (3) in question must be able to work in such a way that it does not come into contact with the cylinder base (6) when the piston (1) (to which it is attached) is at the top dead center of a has not come into contact in its lower central part with the crankpin when the piston (1) is halfway (90 °), (position where the rod (s) by its (their) maximum inclination offers (s) its (their) smaller geometric distance projected between the axis of the small end and the axis of the big end). Furthermore, it must allow the rod (s) (2) to move freely (without contact) in the longitudinal direction and thus to respect a minimum space 20 but sufficient with the two rigid guides (4) fixed in parallel to the axis of the cylinder (s) (6) in the engine casings (7). (Figures 7/16 and 15/16).
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1103204A FR2981698A1 (en) | 2011-10-20 | 2011-10-20 | Device for guiding piston of internal combustion heat engine, has sliding-door fixed under piston by rivets, welding and screws or directly fixed under piston, where door is equipped in lower part of two rings parallel to piston or cylinder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1103204A FR2981698A1 (en) | 2011-10-20 | 2011-10-20 | Device for guiding piston of internal combustion heat engine, has sliding-door fixed under piston by rivets, welding and screws or directly fixed under piston, where door is equipped in lower part of two rings parallel to piston or cylinder |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2981698A1 true FR2981698A1 (en) | 2013-04-26 |
Family
ID=46275852
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR1103204A Pending FR2981698A1 (en) | 2011-10-20 | 2011-10-20 | Device for guiding piston of internal combustion heat engine, has sliding-door fixed under piston by rivets, welding and screws or directly fixed under piston, where door is equipped in lower part of two rings parallel to piston or cylinder |
Country Status (1)
Country | Link |
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FR (1) | FR2981698A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20220389953A1 (en) * | 2021-06-04 | 2022-12-08 | Alfadan, Inc. | Cylinder unit for eliminating secondary forces in inline internal combustion engines |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4035562A1 (en) * | 1990-11-08 | 1992-05-14 | Zikeli Friedrich Dipl Ing Th | Piston cross thrust ring and crank slide - involves ring and slide assemblable on pins on body of crankshaft |
JP2001303901A (en) * | 2000-04-25 | 2001-10-31 | Mitsubishi Heavy Ind Ltd | Diesel engine |
WO2007036007A1 (en) * | 2005-09-30 | 2007-04-05 | Boyan Kirilov Bahnev | Piston cam engine |
CN201318216Y (en) * | 2008-12-22 | 2009-09-30 | 靳北彪 | External connecting bar engine |
-
2011
- 2011-10-20 FR FR1103204A patent/FR2981698A1/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4035562A1 (en) * | 1990-11-08 | 1992-05-14 | Zikeli Friedrich Dipl Ing Th | Piston cross thrust ring and crank slide - involves ring and slide assemblable on pins on body of crankshaft |
JP2001303901A (en) * | 2000-04-25 | 2001-10-31 | Mitsubishi Heavy Ind Ltd | Diesel engine |
WO2007036007A1 (en) * | 2005-09-30 | 2007-04-05 | Boyan Kirilov Bahnev | Piston cam engine |
CN201318216Y (en) * | 2008-12-22 | 2009-09-30 | 靳北彪 | External connecting bar engine |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20220389953A1 (en) * | 2021-06-04 | 2022-12-08 | Alfadan, Inc. | Cylinder unit for eliminating secondary forces in inline internal combustion engines |
US11885378B2 (en) * | 2021-06-04 | 2024-01-30 | Alfadan, Inc. | Cylinder unit for eliminating secondary forces in inline internal combustion engines |
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