Volvo S90 RECARGE Owner's Manual page 488

STARTING AND DRIVING
11
Petrol particle filter
Petrol cars are fitted with particle filters for
more efficient emission control.
Particles in the exhaust gases are collected in
the petrol particle filter during normal driving.
In normal driving conditions, passive regenera-
tion takes place, which leads to the particles
being oxidised and burned away. The filter is
emptied in this way.
If the car is driven at low speed or with repea-
ted cold starts in low outside temperature,
active regeneration may be necessary. Regen-
eration of the particulate filter is automatic and
normally takes 10-20 minutes. Fuel consump-
tion may temporarily increase during regenera-
tion.
When driving short distances at low
speeds in a petrol car
The capacity of the emissions system is affec-
ted by how the car is driven. Driving varying
distances and at different speeds is important
in order to achieve performance that is as
energy-efficient as possible.
Driving short distances at low speeds (or in
cold climates) frequently, where the engine
does not reach normal operating temperature,
can lead to problems that can eventually
cause a malfunction and trigger a warning
message. If the vehicle is mostly driven in city
11 Applicable to certain variants.
486
traffic, it is important to regularly drive at
higher speeds to allow the emissions system
to regenerate.
The car should be driven on A-roads at
•
speeds in excess of 70 km/h (44 mph) for
at least 20 minutes between each refuel-
ling.
Related information
Petrol (p. 485)
•
Overheating in the engine and
drive system
Under certain conditions, e.g. hard driving in
hilly terrain and hot climate, there is a risk
that the engine and drive system may over-
heat – in particular with a heavy load.
In the event of overheating, the engine's
•
power may be limited temporarily.
Remove any auxiliary lamps from in front
•
of the grille when driving in hot climates.
If the temperature in the engine's cooling
•
system becomes too high then a warning
symbol is illuminated and the driver dis-
play shows the message Engine
temperature High temperature Stop
safely . Stop the car in a safe way and
allow the engine to run at idling speed for
several minutes and cool down.
If the message Engine temperature
•
High temperature Turn off engine
Engine coolant Level low, turn off
engine is shown, stop the car and switch
off the engine.
In the event of overheating in the gearbox,
•
an alternative gear shift program will be
selected. In addition, a built-in protection
function is activated that, amongst other
things, illuminates a warning symbol and
the driver display shows the message
Transmission warm Reduce speed to
or