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Position: Auto Articles - [Auto News] - HCCI unveiled by General Motors
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HCCI unveiled by General Motors
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A new engine technology was revealed by General Motors, which essentially makes a gasoline engine run like a diesel. The technology is called homogeneous charge compression ignition, or HCCI. For testing, GM has equipped an Opel Vectra and a Saturn Aura with transformed versions of its 2.2L Ecotec four-cylinder engine. GM says that when this engine technology is mixed with variable valve timing, electric cam phasing, direct injection and pressure sensing, it can reach up to a 15% savings in fuel consumption and still be on top of the next emissions requirements.
With a compression for fuel combustion, HCCI uses an ignition system without sparkles. Officials from GM state "An HCCI engine ignites a mixture of fuel and air by compressing it in the cylinder. Unlike a spark ignition gas engine or diesel engine, HCCI produces a low-temperature, flameless release of energy throughout the entire combustion chamber. All of the fuel in the chamber is burned simultaneously. This produces power similar to today鈥檚 conventional gas engines, but uses less fuel to do it."
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