Alternative internal combustion engines are the main source of mechanical energy for vehicle propulsion in the last century. In spite of several attempts to improve its efficiency, it is practically impossible to obtain much greater yields than the present ones, due to a long list of factors. Rotary engines like the Kopelrot promise to reduce the losses generated by the various energy transformations during an alternate engine cycle. In addition to being more compact, it produces more torque than an ordinary engine, and thanks to the SuperFlex system it can use any type of fuel and can adapt automatically to the optimum pressure and temperature requirements for each one. In the present work, the dynamics of the engine, specifically the dynamics of the Differential Velocity Variation Mechanism (DVDM) will be introduced. Along with it, the movements of the pistons, arms and connecting rods during the combustion cycle will be studied, and proposed improvements inrelation to the first prototype.