General Motors demonstrated its progress on developing a future advanced engine technology for consumers that squeezes more miles per gallon of gas and reduces emissions. GM engineers have brought the advanced combustion technology from the laboratory to the test track and, now, to the highway in a driveable concept vehicle - a Saturn Aura equipped with homogenous charge compression ignition (HCCI).
GM demonstrated its latest progress with the HCCI technology during a media test-drive program in the Washington, D.C. and the New York City areas. Journalists drove the HCCI-enabled Aura concept on public roads to get a real-world feel for the efficient and low-emissions engine. HCCI provides up to a 15-percent fuel savings when combined with several additional advanced technologies, while meeting current emissions standards.
The Saturn Aura concept vehicle is capable of operating in HCCI mode during idle, in addition to highway driving. The HCCI operation at idle represents a significant technological advance that GM engineers believe could be the first for the industry. The breakthrough enables a wider range of HCCI operation, extending the efficiency-enhancing benefit of the technology.
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