One clutch assembly is for even gears and the other is
for odd gears.
The hollow shaft itself allows the system to quickly engage even gears, while a solid shaft that runs through the middle
operates odd gears.
The technology is based on the independent management of even and
odd gears which are pre-selected using two separate input shafts.
As I understand it, a dual - clutch transmission is basically two smaller manual transmissions: one for
the odd gears and one for the even gears.
Therefore, only the even or only
the odd gears are in motion at any given time (I think?).
The transmission uses one clutch for even gears and another for
the odd gears.
[2][5] Since alternate gear ratios can preselect [1][2][3][5]
an odd gear on one gear shaft while the vehicle is being driven in an even gear [3](and vice versa), DCTs are the fastest - shifting road car transmission available and are even able to shift faster than a professional racing driver using a manual transmission.
One clutch controls
the odd gears plus reverse, while the other operates the even gears.
The seven - speed dual - clutch gearbox comprises two clutches with four gears each: one for the even and reverse gears, and the other for
the odd gears.
A DSG transmission has two clutches, one for the even gears and one for
the odd gears plus the reverse gear.
Ergonomics are mostly sound, that is, once you make your peace with
the odd gear selector and BMW's iDrive system.
In the 7 - speed DCT, one clutch controls
the odd gears while the other clutch controls the even gears.