SYSTEM FOR ACTIVELY REDUCING ROTATIONAL NON-UNIFORMITY OF A SHAFT, IN PARTICULAR THE DRIVE SHAFT OF AN INTERNAL-COMBUSTION ENGINE, AND METHOD OF OPERATING THE SYSTEM

摘要

The invention concerns a system for actively reducing rotational non-uniformity of a shaft (10), in particular the drive shaft of an internal-combustion engine or a shaft which is coupled, or can be coupled, to the drive shaft. The system includes at least one electrical machine (4) which is coupled, or can be coupled, to the shaft, the electrical machine (4) being controlled in such a way that it generates a rapidly varying torque designed to reduce rotational non-uniformity and superimpose on this torque a positive or negative torque designed to produce, in addition, a driving action or a braking or generating action, respectively. The invention also concerns a method of actively reducing rotational non-uniformity using the system.