Mazda 5 Hydrogen Rotary Hybrid Concept

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While Mazda continues to develop its fascinating gas/hydrogen-powered rotary RX-8 (it should be available in Japan in 2006), it is showing something even more advanced in Tokyo: a rotary hybrid version of the latest Mazda 5.

In the nose of this Premacy (the Japanese-market Mazda 5), Mazda mounted the same bi-fuel, two-rotor hydrogen RENESIS as the impending RX-8--the first time it's been demonstrated in a front-drive application.

The rotary engine links to a Mazda-developed hybrid unit which is also in the nose. There are two fuel tanks: gas beneath the rear seat (a battery array also resides there), and a hydrogen tank in the back, replacing the third row of seats.

In this way, the Mazda 5 can run either on hydrogen or gasoline--just like the dual-fuel RX-8--and you can switch between the two using a small dash button.

Mazda's idea with the Premacy is to expand the range of models in which a hydrogen rotary can potentially be used, and this car is a better fit than the RX-8 for the bi-fuel hardware because of its larger size; the hydrogen tank fills up nearly all of the RX-8's small trunk.

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