DEVICE FOR DAMPING TORSIONAL OSCILLATIONS

Device (1) for damping torsional oscillations, comprising: - a support (2) capable of rotating about an axis (X), - at least one pendular body (3) movable relative to the support (2), and - at least one rolling member (11) cooperating with at least one rolling track (12) integral with the support (2) and with at least one rolling track (13) integral with the pendular body (3) so as to guide the displacement of the pendular body (3) relative to the support (2), the rolling member (11) rolling along each rolling track (12, 13) around a rest position (P0) on said track, at least one of these rolling tracks (12, 13) extending between two ends (P2, P2') and comprising: - a first portion (30) extending at least on one side from the rest position (P0) on said track (12, 13), this first portion (30) having a shape allowing the filtering of a first order value of the torsional oscillations by the pendular body (3) when the rolling member (11) rolls along this first portion (30), and - two second portions (31), each disposed beyond an end (P1, P1') of the first portion (30), each second portion (31) having a shape allowing the filtering of a second order value of the torsional oscillations by the pendular body (3) when the rolling member (11) rolls along one of these second portions (31), the second order value being strictly less than the first order value.