Table of Contents
Advertisement
the steering wheel, high lateral
acceleration, trailer connected to the
proper control module, hands not on
the steering wheel detected for more
than a certain time.
High dynamic driving behaviors,
driving on the lane boundary or
driving off course will prevent the
function from working. FCW braking
and stability system interventions (ESC,
ABS) will also prevent the system from
operating. Changing lane results in
system inhibition for a certain time.
In addition, the driver must respect
some road characteristics such as
minimum-maximum width, lanes
clearly defined by two lane boundaries
and only in limited cases for a limited
time, the presence of at least one lane
boundary.
The LKA system is active both in the
case of both lines visible and available
for the system, and in case of the only
line available on the road.
Each LKA intervention is notified to
the driver with the relative graphics
which is shown for the entire duration
of the system intervention and for a
minimum time of 1 second.
Multiple interventions are allowed
both in terms of visual and acoustic
signals and in terms of steering torque.
If more then three consecutive
interventions are required within a
period of 180 seconds, starting from
the second intervention the acoustic
signal will last 10 seconds longer the
previous one.
Starting from the third acoustic signal
the system will emit a continuous
sound and a message on TFT display
will indicate to keep the center line.
NOTE:
• In case of wet road or raining
conditions the function could be
disabled by the system in order to
minimize the risks.
• The system is developed to work only
on the lines painted on the road
surfaces, but it may happen that
shadows, traces of old lines, road
edges, etc. are also interpreted as
such.
Being this function used to prevent
unintentional lane change/lane drift, it
will be temporary suppressed/inhibited
by a turn indicator activation,
therefore, graphic warning, steering
torque application and vibration will
be terminated. In these conditions the
graphics turn gray.
Driver Assistance Systems
Function Description and
Operating Mode
The function intent is to prevent the
lane departure by warning the driver
through indication on the cluster and
if set applying steering torque and
vibration. The graphic which intent is
to represent at the glance the system
knowledge of the lane in front of the
car, the system suppression status and
warning.
For this a simple colour code has been
adopted for each line (of the two
presented):
• Both grey lines means system
is enabled, not able to operate
(suppression condition present or
lane detection system not able to
estimate properly the lane);
• Left/right grey line: the lane
detection system is not able to detect
that specific lane boundary;
• Yellow line: there is a steering
torque intervention in progress that
tries to prevent a departure on that
side, in this situation the warning
should increase the driver attention
requiring him to properly handle the
situation;
• Yellow flashing line: the graphic is
shown whenever the system detects
a very imminent lane departure,
at this can be added torque and
6
253
Advertisement
Table of Contents
