High-Mileage, Low Emissions
General Motors has eliminated the spark from the engine cycle in a bold and challenging effort to produce a powerplant that delivers the fuel efficiency of a diesel with the low emissions of a petrol motor. The company has released two concept cars that use Homogenous Charge Compression Ignition (HCCI) technology to burn leaner and cleaner at lower temperatures and deliver up to 15% higher fuel economy.
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