Device for damping vibrations in a hydraulic force-transmission circuit, in particular for hydraulic clutch control

摘要

A hydraulic vibration damping device (1) is integrated in a hydraulic loop forming a clutch hydraulic control system. The device (1) includes a main body (6) and an insertion piece (8) at least partially received in the main body (6); the device (1) extends along a longitudinal axis (X) between an upstream end (10) and a downstream end (11) defined in a direction of a fluid flowing in the hydraulic loop. The device (1) defines a first path (35) arranged in the insertion piece (8) whose axis is in the form of a spiral body (16) of the longitudinal axis (X) of the device, the path (35) allowing the fluid in the device (1) at the upstream end (10) to flow through a first length to arrive the downstream end (11); and at least a second path (26, 50) which allows the fluid in the device (1) at the upstream end (10) not to flow through the first path (35) but flow through a second length which is smaller than the first length to arrive the downstream end (11); and the device (1) is such configured that in the device the fluid continuously approaches to the downstream end (11) when flowing from the upstream end (10).