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For people who have no time to spare.
Even when changing gear.
New Porsche Doppelkupplung (PDK).
The optional Porsche Doppel-
fuel consumption, without having
kupplung (PDK), with both manual
to sacrifice the ease of automatic
gearshift and an automatic mode,
transmission.
enables smooth gear changes
with no interruption in the flow of
In total, PDK has seven gears
power. This results in significantly
at its disposal. Gears 1 to 6 have
faster acceleration and lower
a sports ratio and top speed is
reached in 6th gear. The 7th gear
has a long ratio and helps to
reduce fuel consumption even
further.
PDK is essentially two half gear-
boxes in one and thus requires
two clutches – designed as
a double wet clutch transmission.
· 42 ·
3
1
5
7
This double clutch provides an
alternating, non-positive connection
between the two half gearboxes
and the engine by means of two
separate input shafts (input shaft
1 is nested inside the hollowed-
out input shaft 2).
The flow of power from the engine
is only ever transmitted through
one half gearbox and one clutch
at a time, while the next gear
is preselected in the second half
Boxster S
2
6
4
R
gearbox. During a gear change,
Porsche Doppelkupplung (PDK)
therefore, a conventional shift no
in detail.
longer takes place. Instead, one
clutch simply opens and the other
The crankshaft transmits engine
closes at the same time. Gear
torque to the dual-mass flywheel
changes can therefore take place
which is then channelled through
within milliseconds.
the clutch housing and onto the
multi-plate clutches, or to be more
Clutch 1 controls the first half
precise, the outer disc carrier.
gearbox, which contains the odd
gears (1, 3, 5, 7) and reverse.
Clutch 2 controls the second,
which contains the even gears
(2, 4, 6).
· 43 ·
Boxster |
Drive
Porsche Doppelkupplung (PDK)
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