The Saturn Aura HCCI concept which offers up to 15-percent fuel savings has been presented by GM at a media event in New York and Washington.
The Saturn Aura HCCI technology requires only conventional automotive exhaust after-treatment and is also compatible with the E85 ethanol fuel.
The Saturn Aura HCCI will include engine efficiency approaching the benefit of a diesel, builds off proven gasoline direct-injection, and variable valve actuation technologies and can be adapted to conventional gasoline engine architectures.

Those are some of the highlights of the Saturn Aura HCCI.
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