Advanced alternating piston rotary engine

A concentric rotary internal combustion engine, comprising:

• a static cylindrical engine-head block, with ignition points, inlet ports, and outlet ports defining a surrounding static circular part of a set of rotational internal-combustion chambers which freely rotate about a rotatable drive shaft;
• one rotating assembly set containing more than one rotational internal-combustion chambers, the assembly set comprising a first side-disk and a second side-disk, said side-disks facing each other and rotating interdependently relative to each other whereby an internal combustion cycle may be performed in between them;
• each side-disk having a first hub and a second hub, and for each rotational internal combustion chamber, at least two rotationally consecutive pistons, each of said pistons being fixed onto its corresponding side-disk in an alternative position, relative to the positions of pistons on the opposite facing side-disk, wherein said assembly set is substantially sealed within the static cylindrical engine-head block, and freely rotates on the drive shaft such that each rotational internal combustion chamber comprises a space contained in a varying volume chamber enclosed between faces of two consecutive pistons of said at least two pistons, including respective portion of the side-disks with their radially outward hubs, and a portion of the engine-head block between said faces;
• a rotatable drive shaft extending axially through [UI] the center of said side-disks;
• wherein the pistons are radially distanced from said drive shaft;
• wherein the hubs cooperate with each other so that the first side-disk and the pistons fixed thereto can rotate relative to the second side-disk and the pistons fixed thereto, and vice versa, such that in operation one of said pistons will be a leading piston and one a trailing piston;
• wherein the first and second side disks of the assembly set extend radially from axially opposite end portions of the hubs, respectively;
• a planetary gear train at each axial end of the drive shaft, each planetary gear train comprising a central sun gear, a peripheral ring gear, and a planets carrier holding two or more planet gears for rotation in between the sun gear and the ring gear;
• a set of two unidirectional rotation transmission devices (URTDs) associated with each side disk, wherein each side disk is connected to a periphery of the set of two URTDs placed back-to-back;
• wherein a first URTD of said set of two URTDs is adapted to connect or disconnect with the drive shaft and therefore provides for fast moving/direct torque, and a second URTD of said set of two URTDs is adapted to connect or disconnect with the planets carrier of the planetary gear train and therefore provides a multiplied torque, not only to prevent, on explosion, the backward rotation of the trailing piston, but mainly to force its advancement past one of said ignition points to ignite a next explosion;
• said inlet ports being located on surrounding cylindrical engine-head block, for admitting air and/or an air/fuel mixture into the combustion chambers;
• ignition devices, and/or fuel injectors on the static cylindrical engine-head block to induce explosion in the combustion chambers;
• and
• said outlet ports being located on surrounding cylindrical engine-head block for exhausting spent gases from the combustion chambers;
• wherein the consecutive pistons, the inlet and outlet ports have angular arc distance according to the following general formula:
• p
• o
• =
• 180
• ⁢
• °
• ·
• (
• C
• R
• -
• G
• R
• )
• (
• G
• R
• +
• 1
• )
• ·
• (
• C
• R
• -
• 1
• )
• where pn° is a required angular arc distance between front and rear faces of each piston, or a mean angular distance in case concave piston faces are used, and the required angular arc distance of the inlet and outlet ports;
• n is the number of combustion chambers;
• 180° is a basic generating angle;
• CR is a desired Compression Ratio and GR is a Geared Reduction Ratio of the planetary gear train.