Lexus ES350 Manual page 73

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When stopped/during start off
The gasoline engine stops when the vehicle is stopped. During start off,
the electric motor (traction motor) drives the vehicle. At slow speeds or
when traveling down a gentle slope, the engine is stopped and the elec-
tric motor (traction motor) is used.
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During normal driving
The gasoline engine is predominantly used. The electric motor (traction
motor) charges the hybrid battery (traction battery) as necessary.
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When accelerating sharply
When the accelerator pedal is depressed heavily, the power of the
hybrid battery (traction battery) is added to that of the gasoline engine
via the electric motor (traction motor).
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When braking (regenerative braking)
The electric motor (traction motor) charges the hybrid battery (traction
battery).
Vehicle proximity notification system
When driving with the gasoline engine stopped, a sound, which changes
in accordance with the driving speed, will be played in order to warn peo-
ple nearby of the vehicle' s approach. The sound will stop when the vehicle
speed exceeds approximately 15 mph (25 km/h).
ES350_300h_OM_OM33A60U_(U)
1-2. Hybrid system
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