REPORT: Chevy Volt engine/generator uses Otto Cycle, not Atkinson
Most hybrid vehicles' gas-powered engines use an Atkinson Cycle, including the Toyota Prius and GM's 2-Mode Hybrid trucks and SUVs. According to the reliable Lyle Dennis of GM-Volt.com, the Chevy Volt will not use an Atkinson Cycle engine, instead relying on the standard Otto Cycle. For what it's worth, we also know that the Volt's 1.4-liter four cylinder engine will be controlled and monitored by all manner of electronic gadgetry, and we're sure the automaker has done its homework on making it as efficient as possible.
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