| 摘要 |
<p>A continuously variable speed ratio transmissions for an in-wheel application use one or more magnetorheological (MR) or oil-shear clutch assemblies, each of which can have a unique speed ratio, to transmit torque between an input shaft and an output shaft. Each MR clutch assemblies (100) includes a rotateable input cylinder (102) and a rotateable output cylinder (104). The input cylinder and the output cylinder are separated by a gap (105) that is filled with MR fluid. A multitude of coil windings (107) are disposed on the stator (108) of each of the MR clutch assemblies. When current flows through the coil windings, a magnetic flux field is produced in the MR fluid. The MR fluid densities, transferring input cylinder torque to the output cylinder by shear. A control unit can control current to the coil windings so that only clutch assemblies having the desired speed ratio are actuated.</p> |
