Ferrari 458 Spider, Owner'S Manual

Page: 72 / 260

72
Safety
ABS and EBD
The ABS system is a safety device which activates to prevent wheel
locking if the driver presses the brake pedal too sharply, especially
under low grip conditions.
The system is composed of:
- electro-hydraulic unit
- electronic brake-force distribution
EBD
- four speed sensors on the wheels, incorporated in the bearings
- the entire ESP sensor system (steering angle sensor,
accelerometer, yaw sensor, etc.).
These features add to the vehicle’s standard braking system,
without changing its characteristics.
Important note
When the
ABS
system is active, during emergency braking or in
poor grip conditions, a “pulsing” sensation will be felt through
the brake pedal. Hold the brake pedal down to continue the
braking action.
When one of the wheels starts locking, the hydraulic control unit
controls the braking circuit by running a 3-phase cycle:
- reduction (if necessary)
- maintenance
- pressure increase in the hydraulic circuit.
In the event of ABS activation under braking, these regulation
cycles will be repeated until the car comes to a stop or pressure on
the brake pedal is reduced.
In addition, the system offers the following advantages:
- Driving stability (no skidding): even in the event of sharp braking
approaching wheel locking.
- Manoeuvrability (no side-skidding on sharp turns).
This means that even when an emergency situation requires sudden
braking, the driver can avoid obstacles, or brake on a curve, without
affecting the vehicle stability.
Warning
ABS
system performance remains unaltered as long as the
speed limit for the tyre side grip is not exceeded. If this limit is
exceeded, vehicle skidding cannot be avoided.
- Optimal braking distance:
depending on the type of road surface, the braking distance may
be reduced by as much as 40%.
Warning
The
ABS
system does NOT exempt the driver from driving
carefully and responsibly at all times.