Porsche 911 TARGA 4 -, Руководство пользователя

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Dynamic engine mounts.
The dynamic engine mounts are included
as part of the Sport Chrono Package. The
electronically controlled system minimises
the oscillations and vibrations of the entire
drivetrain, especially the engine, and
combines the benefits of a hard or soft
engine mounting arrangement.
The stiffness and damping properties
of the engine mounts are adapted to
changes in driving style and road surface
conditions. Handling is noticeably more
stable under load change conditions and
in fast corners. Whenever a less asser-
tive driving style is adopted, the dynamic
engine mounts provide a greater level
of comfort.
Wheels.
The 911 Targa 4 is equipped with 19-inch
wheels as standard. These are light-
weight alloys featuring a classic sporty
design. Tyre sizes are 235/40 ZR 19
and 295/35 ZR 19 at the front and rear,
respectively.
For fuel consumption and CO
2
emissions, please refer to page 103.
The S model is equipped with light-alloy
20-inch wheels as standard. The visual
effect is sporty and dynamic.
The large tyre size improves both ride
comfort and track performance. Rolling
resistance, dry braking distances and
tyre weight are all comparatively low.
Porsche Stability Management (PSM).
As standard, the new 911 Targa 4 models
are equipped with Porsche Stability
Management (PSM) which maintains
stability even at the limits of dynamic
driving performance.
Sensors continuously monitor the direc-
tion, speed, yaw velocity and lateral
acceleration of the car. PSM uses this
information to calculate the actual
direction of travel at any given moment. If
the car begins to oversteer or under-
steer, PSM applies selective braking on
individual wheels to restore stability.
Under acceleration on wet or low-grip road
surfaces, PSM improves traction using
the automatic brake differential (ABD) and
anti-slip regulation (ASR). The result is a
high level of driving stability and safety
combined with extraordinary agility.
Porsche Torque Vectoring (PTV and
PTV Plus).
PTV in conjunction with the manual
gearbox, or PTV Plus with Porsche
Doppelkupplung (PDK), are available as
options for the new 911 Targa 4 and
are standard on the new 911 Targa 4S.
Both systems actively enhance vehicle
dynamics and stability by braking the
rear wheels as the situation demands.
In addition, a mechanical (PTV) or elec-
tronic (PTV Plus) rear-axle differential
lock is responsible for infinitely variable
torque distribution.
When the car is driven assertively into
a corner, moderate brake pressure is
applied to the inside rear wheel. Conse-
quently, a greater amount of drive force
is distributed to the outside rear wheel,
inducing an additional rotational pulse
(yaw moment) around the vehicle’s
vertical axis. This results in a direct and
sporty steering action as the car enters
the corner.
At low and medium vehicle speeds, PTV
and PTV Plus significantly increase agility
and steering precision. At high speeds
and when accelerating out of corners,
the rear differential lock ensures greater
driving stability. Whichever system is
fitted, it interacts with Porsche Stability
Management (PSM) to improve driving
stability on a range of surface conditions,
including the wet and snow.
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