Engineers from the Tomsk company "Tekhnologiya Market" have developed a new piston engine design that allows increasing working volume and torque without a significant increase in size. They proposed replacing the classic connecting rod with a system of rods and cycloidal cams.

The new scheme uses a cylinder block with pistons connected to rods that interact with specially shaped cams via their side surface.

The main feature of the design is that the rods have a variable cross-section along their length. When the piston moves, they press not with their end face, but with their side surface, creating a rotating moment. Due to this, the piston stroke is no longer limited by the eccentricity or angle of inclination of traditional mechanisms.

Another feature is the possibility of self-braking. At certain angles of inclination of the rod surface, the engine will not be able to spontaneously rotate under load without power input.

The innovative engine can be used not only as an internal combustion engine but also as a hydraulic or pneumatic drive.