Patent ID: 7427186

Claim:
Rotary engine comprising at least one shaft mounted to rotate with respect to another element of the engine, fixed or rotary, to which it is connected by at least one bearing, it being possible for the engine to operate in at least two different operating speeds, the shaft comprising means of connection to the bearing that have a state of stiffness that can vary with the engine operating speed, characterized in that the connecting means comprise a squirrel cage comprising at least two points of attachment, on the one hand to the bearing and, on the other hand, to the shaft, between which points there extends a portion that is flexible in bending, the shaft comprises an actuator able to adopt at least two positions for controlling the state of stiffness of the squirrel cage, the actuator comprises a piston designed to be displaced, against the action of return means, by a pressure of oil in a chamber formed between the piston and the shaft from a rigid state of stiffness position to a soft state of stiffness position, and vice versa.