Patent application number | Description | Published |
20090215570 | Planetary transmission with continuously variable transmission ratio - A planetary transmission having a continuously variable transmission ratio. The transmission includes two sun wheels having sun wheel circumferential surfaces, and that are axially spaced and rotatable independently of each other around the same axis of rotation. A ring wheel is situated on the same axis as the sun wheels and has an internal circumferential surface. Planet wheels are provided having planet wheel circumferential surfaces that are in frictional contact with the internal circumferential surface of the ring wheel and the sun wheel circumferential surfaces. A web element is also provided, and the planet wheels are each rotatable about an associated planet wheel axle, which is guided in the web element so that it is movable in the radial direction relative to the transmission longitudinal axis. | 08-27-2009 |
20100273600 | AUTOMATIC TRANSMISSION - An automatic transmission includes first to third single-pinion planetary gearsets. The second ring gear and third sun gear are coupled to the first carrier and first ring gear respectively to constitute first and second rotor units. Input and output shafts are coupled to the second sun gear and third ring gear respectively. A first clutch selectively holds the first sun gear to the third carrier. A first brake selectively holds the first sun gear stationary. A second clutch selectively holds the second sun gear to the third carrier. A third clutch selectively holds the second carrier to the second rotor unit. A fourth clutch selectively holds the second carrier to the third carrier. A second brake selectively holds the first rotor unit stationary. At least eight gear ratios and one reverse gear ratio are obtained by simultaneous application of three of the clutches and brakes. | 10-28-2010 |
20100273601 | AUTOMATIC TRANSMISSION - An automatic transmission including three single pinion planetary gearsets and six friction elements, in which an input shaft is always connected to a first sun gear of a first planetary gearset, the output shaft is always connected to a second ring gear of a second planetary gearset, a third sun gear of a third planetary gearset is always kept in a fixed state relative to a transmission case of the automatic transmission, a first ring gear of the first planetary gearset and a third pinion carrier of the third planetary gearset are always connected to each other and constitute a first rotary member, and at least eight forward speeds and one reverse speed are respectively established by simultaneous engagements of three friction elements selected from the six friction elements. | 10-28-2010 |
20110028261 | AUTOMATIC TRANSMISSION - An automatic transmission includes first to third single-pinion planetary gearsets. The second ring gear and third sun gear are coupled to the first carrier and first ring gear respectively to constitute first and second rotor units. Input and output shafts are coupled to the second sun gear and third ring gear respectively. A first clutch selectively couples the first sun gear to the first carrier. A second clutch selectively couples the second sun gear to the third carrier. A third clutch selectively couples the second carrier to the second rotor unit. A fourth clutch selectively couples the second carrier to the third carrier. A first brake selectively holds the first sun gear stationary. A second brake selectively holds the third carrier stationary. At least eight forward gear ratios and one reverse gear ratio are obtained by simultaneous application of three of the clutches and brakes. | 02-03-2011 |
20130299296 | Switchable Coupling, in Particular for Passenger Vehicle Auxiliary Assemblies - A switchable coupling, in particular for vehicle auxiliary assemblies, is provided. The coupling includes an actuating system actuated electrically, mechanically, pneumatically or hydraulically between a driving element and an output element, and a switching element movable between switching start and end positions counter to the force of one or more resetting elements upon actuation of the actuating system. In the end position, the switching element connects the driving and output elements such that the output element and an auxiliary coupling connected thereto rotate with the driving element. After deactuation, locking bodies located on the auxiliary coupling produce an connection between the driving and output elements which continues to conduct torque between the driving and output elements. The connection is interrupted only when the rotational speed of the driving element falls below a limit value. The coupling does not require a permanent supply of power in the open or closed state. | 11-14-2013 |
20130299297 | Switchable Coupling - A switchable coupling with a coupling system between a driving element and an output element is provided. The switchable coupling includes an actuator, an elastic actuating element and a switching element movable between starting, central and end positions. In the central position the switchable coupling has a different state (open or closed) than in the starting position. The switchable coupling further includes a bolt constrained between first and second bolt stops. Axial movement of the switching element causes operative surfaces connected to the switching element or the bolt to engage with elements on other of the switching element and the bolt, such that the bolt rotates relative to the switching element. The bolt alternately moves relative to the switching element into a first relative position blocking switching element movement in the central position, and into a second relative position permitting movement of the switching element toward the starting position. | 11-14-2013 |