BYD SEAL 2023 - Page 113

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V
ehicle control is transferred to the
driver if the accelerator or brake pedal
is pressed with ACC active. As a result,
the ACC system cannot keep a safe
distance from the vehicle ahead.
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ACC may have no or slow responses to
a vehicle ahead that brakes or stops
suddenly, resulting in a risk of late
braking. In such cases, there will be no
take-over request.
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In some cases, such as when the
vehicle ahead is going too slow, when
lane change is too fast, or when the
safe distance from the vehicle ahead
is too short, there is no adequate time
for the system to decrease the relative
speed, so response has to come from
the driver. The system cannot give
audio or visual warnings in every case.
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If ACC is activated with the vehicle
stationary, the system identi󽗉es any
stationary obstacle ahead and keeps
the vehicle still to ensure a safe startup
and prevent collision. However, this
function does not cover all obstacles,
so the driver must be alert.
●
A short distance from an adjacent lane
(or a vehicle on an adjacent lane that
is too close to the ACC vehicle's lane)
may trigger ACC to brake.
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Vehicles coming into the ACC vehicle's
lane and within the detection range of
its front mmWave radars are identi󽗉ed
as target vehicles and prompt a
response accordingly, which may lead
to hard or late braking.
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Detection may be a󽗈ected or delayed
in some environments. If the radar
re󽗊ection cross-sectional area of the
target (a bicycle, four-wheeler, or
pedestrian, for example) is too small,
the system may not be able to
establish its distance, resulting in
either late or no response to those
vehicles. In such cases, vehicle speed
must be controlled by the driver.
In addition, detection may also be
a󽗈ec
ted or delayed by noise or
electromagnetic interference.
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ACC cannot target vehicles with too
small contact ratio, so the driver must
keep control of the vehicle.
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When the vehicle stops as it follows
a vehicle ahead, in rare cases, the
system does not recognize the end of
the vehicle ahead but the lower end of
the target (for example, the rear axle of
a truck with a high chassis or a vehicle
bumper). In such cases, the system
cannot ensure proper stop distance, so
the driver must stay alert and be ready
to brake.
●
If ACC is activated with the vehicle
stationary, the system identi󽗉es any
stationary obstacle ahead and keeps
the vehicle still to ensure a safe startup
and prevent collision. However, this
function does not cover all obstacles,
so the driver must be alert.
●
Modifying the vehicle structure, such
as lowering the chassis or changing
the front license mounting plate may
a󽗈ect the ACC system.
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Do not use the ACC system when
visibility is poor, or when driving on
slopes, winding roads, or wet roads
(covered in ice/snow or 󽗊ooded).
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Make sure to go to a BYD authorized
dealer or service provider for
professional calibration and checking
of front mmWave radars or the
multifunctional video controller in any
of the following situations:
●
The front mmWave radar, front
bumper, or front windshield has been
removed.
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Wheel alignment has been carried
out.
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The vehicle has experienced a
collision.
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