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Are All Hybrids Created Equal?

Toyota perfected the series/parallel or "strong" hybrid to deliver the energy-saving benefit of a series hybrid together with the acceleration benefit of a parallel hybrid. Two key technologies — the power split device and sophisticated energy management — make this possible. They constantly optimize the flows of mechanical power and electric power for safe and comfortable vehicle operation at the highest possible efficiency.

Three Kinds of Hybrids

SERIES HYBRID: Electric motor drives wheels; engine's only job is to generate electricity.	PARALLEL HYBRID: Engine is main way of driving wheels; motor assists for acceleration.	SERIES/PARALLEL HYBRID (Prius): "Power split device" delivers a continuously variable ratio of engine/motor power to wheels. Can run in "stealth mode" on its stored electricity alone.
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Hybrid System Comparison

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