Patent ID: 8105203
Filing Date: 2012-01-31
Classification: F16H,Y10T

Abstract:
1. A dual clutch transmission comprising: first and second clutches alternately engaged/disengaged so that, during a shift of engagement between the first and second clutches, an engagement action of one of the first and second clutches overlaps a disengagement action of the other of the first and second clutches; a group of forward-traveling odd-numbered speed drive trains, wherein, when one of the forward-traveling odd-numbered speed drive trains is selected to be activated, the selected forward-traveling odd-numbered speed drive train is activated by engaging the first clutch; a group of forward-traveling even-numbered speed drive trains, wherein, when one of the forward-traveling even-numbered speed drive trains is selected to be activated, the selected forward-traveling even-numbered speed drive train is activated by engaging the second clutch; a backward-traveling drive train, wherein, when the backward-traveling drive train is selected to be activated, the selected backward-traveling drive train is activated by engaging one of the first and second clutches; a traveling direction setting means for establishing either a forward-traveling state or a backward-traveling state; and a traveling mode setting means for establishing either a normal traveling mode or a reverse mode, wherein, when the backward-traveling state is established by the traveling direction setting means regardless of whether the normal traveling mode or the reverse mode is established by the traveling mode setting means, the backward-traveling drive train is selected to be activated and is activated by engaging the one of the first and second clutches; wherein, when the normal traveling mode is established by the mode setting means and the forward-traveling state is established by the traveling direction setting means, any one drive train of all the forward-traveling odd-numbered and even-numbered speed drive trains is selected to be activated so as to correspond to variation of an accelerator position and an actual traveling speed of a vehicle, and is activated by engaging the first or second clutch for activating the drive train selected to be activated, and wherein, when the reverse mode is established by the traveling mode setting means and the forward-traveling state is established by the traveling direction setting means, a predetermined forward-traveling drive train of all the forward-traveling odd-numbered and even-numbered speed drive trains is selected to be activated regardless of variation of the accelerator position and the actual traveling speed of the vehicle, and is activated by engaging the first or second clutch that is different from the clutch for activating the backward-traveling drive train.