MECHANISM FOR FILTRATION OF TORQUE FLUCTUATIONS OF A SECONDARY ORGAN

摘要

A mechanism for filtering torque fluctuations is interposed between a crankshaft of an internal combustion engine rotating about an axis of revolution (100) and a gearbox. This mechanism comprises a damping member (14, 114, 214, 15) rotating about the axis of revolution (100), an oscillating flywheel (22, 122, 222) rotating about the axis of revolution ( 100) relative to the damping member (14, 114, 214), and articulated modules (26, 126, 226) permitting an angular displacement of the oscillating flywheel (22, 122, 222) relative to the damping member (14, 114, 214) on either side of an equilibrium position. The articulated modules (26, 126, 226) each comprise at least one oscillating arm (26.1, 226.1) pivoting radially relative to the member to be damped and a kinematic connecting member (26.4, 226.4, 26.40) between the oscillating arm ( 26.1, 226.1) and the oscillating flywheel (22, 122, 222), positioned so that when the mechanism rotates about the axis of revolution (100), the centrifugal forces on the oscillating arm (26.1, 226.1) generate on the member to be damped (14, 114, 214, 15) an antagonistic pair which tends to recall the oscillating flywheel (22, 122, 222) and the member to be damped (14, 114, 214). ) to the equilibrium position. The antagonistic torque increases with the speed of rotation of the filter mechanism and with the amplitude of the angular deflection. The filtration mechanism further comprises a primary member kinematically (12, 112, 212) interposed between the crankshaft and the member to be damped (14, 114, 214), the member to be damped constituting a secondary member rotating around the axis of revolution (100) relative to the primary member (12, 112, 212).