Patent ID: 6976467
Filing Date: 2005-12-20
Classification: F01B,F02B

Abstract:
1. A reciprocating internal-combustion engine, of the type comprising at least one hollow cylinder, inside which there is a chamber for the working fluid, said chamber having an end that is closed by a head and an opposite end that is closed by a piston that is adapted to slide with a reciprocating rectilinear motion in said chamber between a bottom dead center, which determines the maximum distance from said head, and a top dead center, which determines the minimum distance from said head, and a device for converting said reciprocating rectilinear motion into a rotary motion of a driving shaft that comprises at least one push rod, which is substantially perpendicular to said shaft and has a first end associated with the piston and a second end provided with pusher elements, and at least one contoured eccentric element that is keyed on said shaft and on which there is a circuit element that is adapted to be followed by said pusher elements that are mechanically connected thereto, the action of the fluid in the chamber imparting to the piston a thrust for actuating the rod with a reciprocating rectilinear motion, with the sliding of the pusher elements along the circuit element so as to transfer said thrust to the eccentric element for the rotary actuation of the driving shaft, characterized in that it comprises adjustment means for adjusting said sliding of the pusher elements along the circuit element which are provided so that when the piston is at least proximate to one of said dead centers, keep the rod and the piston in a substantially stationary configuration for a presettable rotation angle of the driving shaft, said circuit element comprising at least two lobes which are mutually blended and offset at 180° with a different average radius of curvature with respect to the center of said eccentric element, the circuit element being asymmetric with respect to a central axis.