Volvo XC 60 TWIN ENGINE, Owner'S Manual

Page: 425 / 620

STARTING AND DRIVING
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423
Brake functions
The car's brakes are used to reduce the speed
or prevent the car from rolling.
Besides the foot brake and parking brake, the car
is equipped with several automatic brake assist
functions. These can assist the driver by not
needing to keep his/her foot on the brake pedal
when stationary at a traffic light, when starting on
an uphill gradient or when driving on a downhill
gradient.
Depending on the car's equipment, the following
auto braking functions are available:
•
Automatic braking when stationary (Auto
Hold)
•
Hill start assist (Hill Start Assist)
•
Auto braking after a collision
•
City Safety
•
Hill descent control (Hill Descent Control)
Related information
•
Foot brake (p. 423)
•
Parking brake (p. 426)
•
Hill descent control (p. 432)
•
Hill start assist (p. 429)
•
Automatic braking when stationary (p. 430)
•
Auto braking after a collision (p. 426)
Foot brake
The foot brake is part of the brake system.
The car is equipped with two brake circuits. If a
brake circuit is damaged, the brake pedal will
engage deeper. Higher pressure on the pedal will
therefore be needed to produce the normal brak-
ing effect.
WARNING
In a de-energised car with the electric motor
and fuel-driven engine switched off it is not
possible to brake the car.
In very hilly terrain or when driving with a heavy
load, the brakes can be relieved by using engine
braking in gear position B.
Use drive mode Off Road for increased engine
braking while driving on steep downhill gradients
at low speeds.
Anti-lock braking system
The car has anti-lock brakes, Anti-lock Braking
System (ABS), which can prevent the wheels
from locking while braking and allows maintained
steering control. Vibration may be felt in the
brake pedal when this is engaged and this is nor-
mal.
A short test of the ABS system is made automat-
ically after the car has been started when the
driver releases the brake pedal. A further auto-
matic test of the system may be made at low
speed. The test may be felt as pulses in the
brake pedal.
Light braking charges the hybrid battery
The electric motor's engine brake is used during
light braking. The car's kinetic energy is then
converted to electrical energy instead, which is
used to charge the hybrid battery. Battery charg-
ing with electric motor braking is indicated in the
driver display, see the section "Hybrid related
information in the driver display".
This function is active in the speed interval
150-5 km/h (93-3 mph). During heavier braking,
as well as outside the speed interval, braking is
supplemented by the hydraulic brake system. The
driver's display shows this by the indicator being
down in the red zone.
The driver display indicates charging during electric
motor braking.