Volvo S90 TWIN ENGINE - Starting and Stopping the Combus Tion Engine in Twin Engine

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STARTING AND DRIVING
444
combustion engine with extra electrical
energy.
Electric motor - Powers the car in electric
operation. If necessary, provides extra torque
and power during acceleration. Provides
electrical all-wheel drive functionality. Recy-
cles brake energy to electrical energy.
Related information
•
General information about Twin Engine
(p. 402)
•
Starting and stopping the combustion engine
in Twin Engine (p. 444)
•
Drive modes (p. 445)
•
Gearbox (p. 438)
•
Factors that affect range when running on
electricity (p. 454)
Starting and stopping the
combustion engine in Twin Engine
An advanced control system determines the
extent to which the car is driven on internal com-
bustion engine, electric motor or both in parallel.
During electric operation, the car may some-
times need to start the internal combustion
engine automatically due to external circumstan-
ces, e.g. in low outside temperatures, which is
completely normal. In addition, the internal com-
bustion engine always starts when the hybrid
battery reaches its lowest state of charge.
Climate settings at low temperatures
In low outside temperatures, the internal combus-
tion engine sometimes starts automatically in
order to achieve the desired passenger compart-
ment temperature and air quality. The amount of
time that the internal combustion engine runs
can be affected by:
•
lowering the temperature
•
reducing the fan strength
•
activating drive mode Pure.
Electric operation in low or high
temperatures
In low or high outside temperatures, the car's
range and output for electric operation may be
reduced and affect how often the internal com-
bustion engine is started automatically.
Emission control
To ensure optimal operation of the emission con-
trol, the internal combustion engine must be run
for several minutes once it has been started. The
duration of the internal combustion engine's run-
ning time varies depending on the temperature of
the catalytic converter.
Related information
•
Drive systems (p. 443)
•
Economical driving (p. 452)
•
Driving with electric operation (p. 453)
•
Drive modes (p. 445)