Engine balancing method and device for accomplishing the method

The method involves nullifying unbalancing torque of the order 1 of an internal combustion engine (3) by generating at each instant, a torque opposed to the unbalancing torque by cylinders (7, 8) connected to the engine. The opposing torque is generated in a range of balancing frequencies closer to a vibratory mode excited by the unbalancing torque. An independent claim is also included for a device for implementing an internal combustion engine balancing method.