Piston engine

F - Mech Eng,Light,Heat,Weapons – 02 – B

Patent

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Details

F02B 75/26 (2006.01) F01B 3/00 (2006.01) F01B 3/04 (2006.01)

Patent

CA 2403178

The invention relates to a piston engine comprising a case (25) containing at least two cylinders (3, 4; 5, 6) with inlet openings and outlet openings, which can be opened and closed by means of controllable valves. Each piston (7, 8, 9, 10) can linearly move inside said cylinders (3, 4, 5, 6) in a reciprocating manner. The inventive piston engine also comprises at least one shaft (17), which is rotatably mounted in the case (25), and a transmission device, with which the linear reciprocating motion of the pistons (7, 8, 9, 10) can be converted into a rotational movement of the shaft (17) or the rotational movement of the shaft (17) can be converted into a linear reciprocating motion of the pistons (7, 8, 9, 10). The transmission device comprises a pivotal lever (13; 18) which can be pivoted around a centrally arranged pivot pin (14; 20) mounted in the case (25). A rotatable roller (15; 19) is placed on each of said pivotal levers (13; 18) at both end areas thereof. The rotational axes of the rollers are each perpendicular to the pivot pin (14; 20), and the rollers (15; 19) roll on a track (16) which is joined to the shaft (17) in a fixed manner while extending between both rollers (15; 19), and which is provided with elevations and recesses. Said elevations and recesses are matched to one another such that the rollers (15; 19) located opposite one another on the pivotal lever (13; 18) are in contact with the track, and such that a connecting rod (12), which is connected to the appropriate piston (7, 8, 9, 10), is additionally joined to both end areas of the pivotal lever (13; 18).

L'invention concerne un moteur à pistons comportant un carter (25) qui contient au moins deux cylindres (3, 4; 5, 6) doté d'orifices d'entrée et de sortie ouverts et fermés par l'intermédiaire de soupapes réglables. Dans chacun desdits cylindres (3, 4, 5, 6) est logé un piston (7, 8, 9, 10) effectuant un mouvement de va-et-vient linéaire. Ledit moteur comprend au moins un arbre (17) logé rotatif dans le carter (25) et un dispositif de boîte de vitesses qui transforme le mouvement linéaire des pistons (7, 8, 9, 10) en mouvement rotatif de l'arbre (17) et le mouvement rotatif de l'arbre (17) en mouvement linéaire des pistons (7, 8, 9, 10). Ce dispositif de boîte de vitesses comprend un balancier (13; 18), qui pivote autour d'un axe de pivotement (14; 20) médian logé dans le carter (25), et aux deux extrémités duquel se trouve un galet (15; 19) rotatif, dont l'axe de rotation est respectivement perpendiculaire à l'axe de pivotement (14; 20). Lesdits galets (15; 19) roulent sur une glissière (16), qui est en liaison fixe avec l'arbre (17), lui-même disposé de telle sorte qu'il évolue entre les deux galets (15; 19). Ladite glissière est munie d'élévations et d'évidements ajustés l'un par rapport à l'autre de telle manière que les galets (15; 19) situés face à face sur le balancier (13; 18) sont en contact avec ladite glissière, et qu'en outre, une barre de couplage (12), articulée sur chacune des deux extrémités du balancier (13; 18), est reliée aux pistons (7, 8, 9, 10) correspondants.

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