METHOD FOR SIZING A TORSIONAL OSCILLATION DAMPER OF A VEHICLE POWER TRAIN

• Main Authors: MAHE, Hervé, LEFEBVRE, Yannick
• Format: Patent
• Language: English; French; German
• Published: 13.06.2018
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MEANS FOR DAMPING VIBRATION; MECHANICAL ENGINEERING; SHOCK-ABSORBERS; SPRINGS; THERMAL INSULATION IN GENERAL; WEAPONS

The invention relates to a method for sizing the second damping stage of a torsional oscillation damper of a vehicle power train (1), said unit including: a system upstream from the torsional oscillation damper; a system downstream from the torsional oscillation damper; and the torsional oscillation damper, including: a first damping stage, including first resilient return members; the second damping stage, including second resilient return members; and a pendulum-type damping device, including a mounting (4) and pendulum bodies (3) movable relative to said mounting (4). Said method includes, given: the value of the moment of inertia (I_transmission) of the downstream system; the value of the moment of inertia of the pendulum-type damping device; the value of the stiffness (K1) of the single resilient return member modelling the first resilient return members; and the value of the stiffness (Kgis) of the input shaft of the gearbox (5), determining the value of the stiffness (K2) of the single resilient return member by modelling the second resilient return members so that the mounting (4) of the pendulum-type damping device is a node for the wave propagating in the power train (1) due to a cyclic irregularity of the drive engine.