A Very Old Technology While the technology and equipment i...
New technology that could bring higher levels of efficiency and cleanliness to internal combustion engines is getting a major boost in research activity. Researchers from General Motors, Bosch, and
In an HCCI engine, fuel is uniformly mixed with air, as in a spark-ignition engine, but with a higher proportion of air to fuel. Instead of a spark plug, the mixture is compressed by the piston until rising temperatures inside the chamber ignites it spontaneously - a process similar to that used in a diesel engine, but at a much lower temperature. The lower combustion temperature, combined with the lean air/fuel ratio, virtually eliminates NOx emissions and lowers throttling losses, which leads to a significant boost in fuel economy. Sophisticated sensors, actuators, and feedback control systems that are both robust and cost-effective are required before HCCI is ready for real-world use. With the added experience of Bosch and Stanford, GM hopes to demonstrate the viability of HCCI within the next few years.
A Very Old Technology While the technology and equipment i...
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