| 摘要 |
The invention pertains to a retarder (2) to brake a driving source (1, 4, 6, 10), comprising a retarder shaft (24), which is engaged to a rotor (40) and an oil pump (42); a stator (44) which jointly with the rotor (40) forms a torus (52) for the receipt of retarder oil (18); a retarder oil circuit (56), which is engaged with the oil pump (42) and the torus (52); a clutch device (34) for engagement and disengagement of the retarder shaft (24) to and from the driving source (1, 4, 6, 10). A tachogenerator (82) is arranged to measure the revolutions of the retarder shaft (24) in order to, with knowledge about the capacity of the oil pump (42), determined when the retarder oil circuit (56) is filled with retarder oil (18), and a control de¬ vice (22) which is engaged to a tachogenerator (82) and to the clutch device (34), the control device (22) of which receives signals from the tachogenerator (82) regarding the revolutions of the retarder shaft (24) and which emits signals to the clutch device (34) to disconnect the retarder shaft (24) from the driving source when the retarder oil circuit (56) is filled with re- tarder oil (18). The invention also pertains to a vehicle (1), comprising such a retarder (2) and a method for engagement and disengagement of a retarder (2). |
