FR2496760A1 - Crank for IC-engine - has connecting rod driving crank via double linkage to reduce friction - Google Patents

Crank for IC-engine - has connecting rod driving crank via double linkage to reduce friction Download PDF

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Publication number
FR2496760A1
FR2496760A1 FR8026921A FR8026921A FR2496760A1 FR 2496760 A1 FR2496760 A1 FR 2496760A1 FR 8026921 A FR8026921 A FR 8026921A FR 8026921 A FR8026921 A FR 8026921A FR 2496760 A1 FR2496760 A1 FR 2496760A1
Authority
FR
France
Prior art keywords
piston
connecting rod
crank
engine
articulated
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Withdrawn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
FR8026921A
Other languages
French (fr)
Inventor
Jean-Pierre Rivere
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renault SAS
Regie Nationale des Usines Renault
Original Assignee
Renault SAS
Regie Nationale des Usines Renault
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 Renault SAS, Regie Nationale des Usines Renault filed Critical Renault SAS
Priority to FR8026921A priority Critical patent/FR2496760A1/en
Publication of FR2496760A1 publication Critical patent/FR2496760A1/en
Withdrawn legal-status Critical Current

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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
    • F02B75/32Engines characterised by connections between pistons and main shafts and not specific to preceding main groups
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01BMACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B9/00Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups
    • F01B9/02Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with crankshaft
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B41/00Engines characterised by special means for improving conversion of heat or pressure energy into mechanical power
    • F02B41/02Engines with prolonged expansion
    • F02B41/04Engines with prolonged expansion in main cylinders
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/36Modified dwell of piston in TDC

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transmission Devices (AREA)

Abstract

The i.c.-engine has a cylinder and piston with a connecting rod (2) at a small operating angle. The connecting rod is articulated, when the piston (1) is at top dead centre, at a right angle to a lever (3) pivoting with it. The lever is also pivoted at a point (M) at one side of the piston axis and produces rotary motion via a link (5). This is articulated at a point on the other side of the piston axis to a crank arm (6). The connecting rod can act with a maximum movement of 4 degrees.

Description

Moteur k frottements réduits
La présente invention est du domaine des moteurs à combustion interne, Elle vise plus précisément un moteur de ce type dont la conception de transmission permet de réduire les frottements dans une large mesure tout en favorisant la combustion.
Motor k reduced friction
The present invention is in the field of internal combustion engines. It relates more specifically to an engine of this type, the transmission design of which makes it possible to reduce friction to a large extent while promoting combustion.

Dans un moteur de conception classique la bielle présente B mi-course une inclinaison de 10 à 150 par rapport à l'axe du piston, ce qui se traduit par des forces non négligeables à vaincre du fait des frottements du piston contre la chemise du cylindre et la zone où sont implantés les segments.L'invention se propose d'obvier à ces inconvénients en fournissant un moteur à frottements réduits, grâce à une nouvelle disposition du système d'embiellage permettant de transformer, comme dans un moteur classique, le mouvement alternatif du piston en un mouvement rotatif
Le moteur à frottements réduits selon la présente invention est plus précisément caractérisé-par le fait qu'il comporte au moins un cylindre dont la bielle du piston présente une inclinaison très faible par rapport à l'axe du piston, cette bielle étant articulée, lorsque le piston est au point mort haut, sensiblement à angle droit, en un point d'un levier monté lui-meme pivotant en un point fixe situé d'un c8té de l'axe du piston et actionnant en rotation par l'intermédiaire d'une biellette y articulée en un point situé de l'autre côté de l'axe du piston la manivelle d'un vilebrequin.
In an engine of conventional design, the connecting rod has a mid-course inclination of 10 to 150 relative to the axis of the piston, which results in significant forces to overcome due to the friction of the piston against the cylinder liner. and the area where the segments are located. The invention proposes to overcome these drawbacks by providing a motor with reduced friction, thanks to a new arrangement of the linkage system making it possible to transform, as in a conventional motor, the movement reciprocating piston in a rotary motion
The reduced friction motor according to the present invention is more precisely characterized in that it comprises at least one cylinder whose piston rod has a very slight inclination relative to the axis of the piston, this rod being articulated, when the piston is in top dead center, substantially at a right angle, at a point on a lever which is itself pivoted at a fixed point situated on one side of the axis of the piston and actuating in rotation by means of a link y articulated at a point located on the other side of the axis of the piston the crank of a crankshaft.

L'inclinaison de la bielle par rapport à l'axe du piston atteint en fonctionnement une valeur maximale de 4 . The inclination of the connecting rod relative to the axis of the piston reaches a maximum value of 4 in operation.

L'invention sera mieux comprise à la lecture de la description suivante de deux formes de réalisation non limitative de moteur
B frottements réduits, en référence aux dessins annexés dans lesquels t - la figure 1 est une vue schématique latérale d'une première
forme de réalisation de moteur å frottements réduits selon
l'invention ; - la figure 2 est une vue schématique latérale d'une seconde
forme de réalisation de moteur à frottements réduits selon
l'invention ; et - la figure 3 est une représentation du cycle compression
détente d'un moteur à frottements réduits selon l'invention.
The invention will be better understood on reading the following description of two non-limiting motor embodiments
B reduced friction, with reference to the accompanying drawings in which t - Figure 1 is a schematic side view of a first
embodiment of motor with reduced friction according to
the invention; - Figure 2 is a schematic side view of a second
embodiment of motor with reduced friction according to
the invention; and - Figure 3 is a representation of the compression cycle
expansion of a reduced friction motor according to the invention.

Dans la forme de réalisation de la figure 1, est schématisé au point mort haut un piston 1 d'un moteur monocylindre, dont la bielle est articulée sensiblement à angle droit en  B un levier 3 monté pivotant en un point fixe M b une de ses extrémités tandis qu'est articulée en B N son autre extrémité une biellette 5 articulée en C à la manivelle 6 d'un vilebrequin N.In the embodiment of FIG. 1, is schematized at top dead center a piston 1 of a single-cylinder engine, the connecting rod of which is articulated substantially at right angles to  B a lever 3 pivotally mounted at a fixed point M b one of its ends while a BN link is articulated at its other end 5 articulated at C at the crank 6 of a crankshaft N.

Dans la forme de réalisation de la figure 2, sont prévus deux cylindres dont les pistons îs, lb sont pourvus respectivement de bielles 2a, 2b montées pivotantes sur le levier 3 symétriquement par rapport au point M de pivotement prévu au centre du levier 3 de façon à définir deux bras 3a, 3bo Aux extrémités libres de ces deux bras, sont articulés en B1, B2, respectivement et symétriquement par rapport à M des système de transmission t biellette 5a, 5b, manivelle 6a, 6b de vilebrequin
N1, N2, identiques à celui représenté à la figure 1.
In the embodiment of FIG. 2, two cylinders are provided, the pistons îs, lb of which are respectively provided with connecting rods 2a, 2b pivotally mounted on the lever 3 symmetrically with respect to the pivot point M provided in the center of the lever 3 so to be defined two arms 3a, 3bo At the free ends of these two arms, are articulated at B1, B2, respectively and symmetrically with respect to M of the transmission system t rod 5a, 5b, crank 6a, 6b of crankshaft
N1, N2, identical to that shown in Figure 1.

Sur la figure 3, est représentée la courbe de compression détente pour une course du piston de 40 mm en ordonnées, les degrés de positionnement du vilebrequin etant portés en abscisses De cette courbe il ressort que, dwune part, le point mort H (PMB) est atteint pour un positionnement à 125 du vilebrequin et que, d'autre part, il se produit à ce EMH une certaine "stationnarité" du piston accrue par rapport B celle d'un moteur de type classique, ce qui est favorable du point de vue du rendement de forme du cycle et de la régularité cyclique de la combustion. Il en résulte que le moteur selon la présente invention satisfait mieux aux normes d'antipollution et de ccinsouunation qu'un moteur classique.In FIG. 3, the expansion compression curve is represented for a piston stroke of 40 mm on the ordinate, the degrees of positioning of the crankshaft being plotted on the abscissa. From this curve it appears that, on the one hand, the dead center H (PMB) is reached for a positioning at 125 of the crankshaft and that, on the other hand, there occurs at this EMH a certain "stationarity" of the piston increased compared to that of an engine of conventional type, which is favorable from the point of view of the cycle form efficiency and the cyclical regularity of the combustion. As a result, the engine according to the present invention better meets the standards of antipollution and ccinsouunation than a conventional engine.

L'agencement selon l'invention permet de faire fonctionner le moteur avec une course de piston très réduite, ce qui entrain une réduction des contraintes de frottement0
En outre, le système d'embiellage selon l'invention peut fonctionner avec des rayons de manivelle importants, pouvant aller jusqu' deux fois la longueur de la course du piston, ce qui se traduit par une diminution des contraintes, donc des frottements au niveau des paliers0
L'agencement selon l'invention permet également d'obtenir un bon équilibrage entre deux pistons voisins et leur-systbme d'embiellsge respectif, comme dans la forme de réalisation représentée B la figure 2o
Il est clair que l'invention n'est nullement limitée aux formes de réalisation décrites ci-dessus, mais quelle englobe toutes les modifications et variantes issues du même principe de base.
The arrangement according to the invention makes it possible to operate the engine with a very reduced piston stroke, which results in a reduction of the friction stresses.
In addition, the crankshaft system according to the invention can operate with large crank radii, which can go up to twice the length of the piston stroke, which results in a reduction in stresses, therefore friction at the level bearings0
The arrangement according to the invention also makes it possible to obtain a good balance between two neighboring pistons and their respective connecting system, as in the embodiment shown in FIG. 2o
It is clear that the invention is in no way limited to the embodiments described above, but which encompasses all the modifications and variants stemming from the same basic principle.

Claims (4)

REVENDICATIONS 1. Moteur b combustion interne à frottements réduits, caractérisé par le fait qu'il comporte au moins un cylindre dont la bielle (2) du piston (1) présente une inclinaison très faible par rapport k l'axe dudit piston, cette bielle étant articulée, lorsque le piston est au point mort haut, sensiblement à angle droit, en un point (A) d'un levier (3) monté lui-mme pivotant en un point fixe (M) situé d'un côté de l'axe du piston et actionnant en rotation par l'intermédiaire d'une biellette (5) y articulée en un point (B) situé de l'autre côté de l'axe du piston la manivelle (6) du vilebrequin (N)o 1. Internal combustion engine b with reduced friction, characterized in that it comprises at least one cylinder, the connecting rod (2) of the piston (1) having a very slight inclination relative to the axis of said piston, this connecting rod being articulated, when the piston is in top dead center, substantially at a right angle, at a point (A) of a lever (3) itself pivotally mounted at a fixed point (M) located on one side of the axis of the piston and actuating in rotation by means of a link (5) hinged therein at a point (B) located on the other side of the axis of the piston the crank (6) of the crankshaft (N) o 2.Moteur selon la revendication 1, caractérisé par le fait que l'inclinaison de la bielle par rapport à l'axe du piston atteint en fonctionnement une valeur maximale de 40o2. Engine according to claim 1, characterized in that the inclination of the connecting rod relative to the axis of the piston reaches in operation a maximum value of 40o 3. Moteur selon la revendication 1 ou 2, caractérisé par le fait qu'il comporte deux cylindres dont les pistons (la, lb) sont pourvus respectivement de bielles (2a, 2b) articulées sur le levier (3) symétriquement par rapport à un point fixe (M) prévu sur ledit levier de façon à définir deux bras (3a, 3b) aux extrémités desquels sont articulés respectivement et symétriquement par rapport B M deux systèmes de transmission (5a, 6a, N1 ; 5b, 6b, N2). 3. Engine according to claim 1 or 2, characterized in that it comprises two cylinders whose pistons (la, lb) are respectively provided with connecting rods (2a, 2b) articulated on the lever (3) symmetrically with respect to a fixed point (M) provided on said lever so as to define two arms (3a, 3b) at the ends of which two transmission systems (5a, 6a, N1; 5b, 6b, N2) are articulated respectively and symmetrically with respect to BM. 4. Moteur selon la revendication 1 ou 3 caractérisé par le fait que le rayon de la manivelle (6, 6a, 6b) est égal à deux fois la course du piston. 4. Engine according to claim 1 or 3 characterized in that the radius of the crank (6, 6a, 6b) is equal to twice the stroke of the piston.
FR8026921A 1980-12-18 1980-12-18 Crank for IC-engine - has connecting rod driving crank via double linkage to reduce friction Withdrawn FR2496760A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8026921A FR2496760A1 (en) 1980-12-18 1980-12-18 Crank for IC-engine - has connecting rod driving crank via double linkage to reduce friction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8026921A FR2496760A1 (en) 1980-12-18 1980-12-18 Crank for IC-engine - has connecting rod driving crank via double linkage to reduce friction

Publications (1)

Publication Number Publication Date
FR2496760A1 true FR2496760A1 (en) 1982-06-25

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995018296A1 (en) * 1993-12-28 1995-07-06 Emilio Galiano Garcia Internal combustion beam engine
WO2002059468A1 (en) * 2001-01-26 2002-08-01 Helmut Obieglo Internal combustion engine with articulated connecting rod and prolonged upper dead center time
FR2828910A1 (en) * 2001-08-21 2003-02-28 Edouard Patrick Mari Bonnefous Four stroke internal combustion engine has pair of parallel crankshafts with three rod linkage for connection to pistons to vary stroke
WO2011006683A1 (en) * 2009-07-14 2011-01-20 Konrad Heimanns Crank drive
WO2022118051A1 (en) * 2020-12-02 2022-06-09 Skulic Ivan New system for converting linear piston motion into crankshaft rotary motion via lever mechanism

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR977781A (en) * 1942-11-10 1951-04-05 Connecting rod and crank transmission device for internal combustion engines

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR977781A (en) * 1942-11-10 1951-04-05 Connecting rod and crank transmission device for internal combustion engines

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995018296A1 (en) * 1993-12-28 1995-07-06 Emilio Galiano Garcia Internal combustion beam engine
WO2002059468A1 (en) * 2001-01-26 2002-08-01 Helmut Obieglo Internal combustion engine with articulated connecting rod and prolonged upper dead center time
FR2828910A1 (en) * 2001-08-21 2003-02-28 Edouard Patrick Mari Bonnefous Four stroke internal combustion engine has pair of parallel crankshafts with three rod linkage for connection to pistons to vary stroke
WO2011006683A1 (en) * 2009-07-14 2011-01-20 Konrad Heimanns Crank drive
CN102472164A (en) * 2009-07-14 2012-05-23 K·赫曼斯 Crank drive
RU2535590C2 (en) * 2009-07-14 2014-12-20 Конрад ХАЙМАННС Crank drive
US9464570B2 (en) 2009-07-14 2016-10-11 Konrad Heimanns Crank drive
WO2022118051A1 (en) * 2020-12-02 2022-06-09 Skulic Ivan New system for converting linear piston motion into crankshaft rotary motion via lever mechanism

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