Patent ID: 7513848

Claim:
A transmission comprising: a first input shaft having a plurality of gearshifts that form a first gearshift group; a second input shaft having a plurality of gearshifts that form a second gearshift group; a first automatic clutch corresponding to the first gearshift group and inserted between the first input shaft and an engine drive shaft; a second automatic clutch corresponding to the second gearshift group and inserted between the second input shaft and the engine drive shaft; and a controller that selects a first gearshift from one of either the first gearshift group or the second gearshift group in accordance with a driving condition of a vehicle having the transmission, engages the clutch corresponding to the gearshift group with the selected first gearshift, selects a second gearshift from the other one of either the first gearshift group or the second gearshift group, causes the clutch corresponding to the gearshift group with the selected second gearshift to slip, and performs interlock brake control, the controller further being configured to end the interlock brake control when at least one of the following occurs: the controller determines that a deceleration speed is greater than a predetermined threshold value; the controller determines that a vehicle that comprises the transmission has continued to travel downhill for a predetermined period of time; and the controller determines that a road surface friction factor is less than a predetermined value.