6 Series 630i (N53) Coupe
•
Motorways and well finished fast roads
(faster acceleration)
•
Main roads and highways
(average acceleration)
•
Urban driving
(reduced acceleration)
On motorways and well finished fast roads, Active Cruise Control is expected to be highly dynamic. In other
words, faster acceleration if the driving mode changes from following a car ahead to clear road ahead. The set
speed is adjusted quickly.
On main roads and highways, Active Cruise Control is expected to be averagely dynamic. In other words,
comfortable acceleration if the driving mode changes from following a car ahead to clear road ahead. The set
speed is adjusted with an average acceleration behaviour.
During urban driving, a reserved dynamic is expected of the Active Cruise Control. In other words, reduced
acceleration behaviour if the driving mode changes from following a car ahead to clear road ahead. The set
speed is adjusted moderately.
The often difficult traffic situations during urban driving make reduced acceleration behaviour necessary.
In addition, the number of bends on the road ahead is analysed and the dynamic of the Active Cruise Control
adjusted accordingly.
System limits
If the limit of the functional range is reached, the driver is prompted to act (brake or swerve).
During operation, the following system functions requiring explanation (for the driver) can occur due to the limits
of the functional range:
•
Limited range and deceleration:
-
The range of the ACC sensor is limited (approximately 120 metres).
Rain, snow and fog absorb radar waves.
This will significantly reduce the range of the ACC sensor.
-
The Active Cruise Control option is only able to effect limited deceleration via the DSC (dynamic
stability control) (a maximum of 2.5 m/s
2
; E65, E66: a maximum of 2.0 m/s
2)
. This means that cruise
control is only able to compensate for a limited relative speed.
Operation of the Active Cruise Control is only possible in flowing traffic in a road speed range from 30 km/h
to 180 km/h.
•
Lateral monitoring range
The lateral monitoring range of the ACC sensor is limited, meaning that a monitored vehicle ahead could be
lost due to a tight bend.
In such cases, cruise control will not accelerate to the set speed for approximately 2 seconds. This will
prevent the vehicle from accelerating too close to the vehicle ahead, which is possibly only briefly not being
monitored.
When driving straight ahead, this can cause a delayed reaction to another vehicle cutting in close in front.
The vehicle cutting in will not be monitored by the cruise control until it is clearly in the same lane as the
vehicle with the Active Cruise Control option.
•
Display for monitored vehicle does not light up, the vehicle remains below the set speed and does not
accelerate further.
Causes:
SBT Active Cruise Control E60, E61, E63, E64, E65, E66
BMW AG - TIS
17.01.2013 23:32
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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