30 Nov '14, 11am

Stanford team develops model and controller for reducing HCCI cycle-to-cycle variation

Stanford team develops model and controller for reducing HCCI cycle-to-cycle variation 30 November 2014 A team led by researchers from Stanford University has developed a simplified, discrete-time analytical model of homogeneous charge compression ignition (HCCI) dynamics. The model forms the basis for the design of a simple controller that reduces combustion timing variations in simulation. Late-phasing homogeneous charge compression ignition operating conditions have the potential to expand the useful operating range of homogeneous charge compression ignition in internal combustion engines. However, significant combustion instabilities can occur at late-phasing operating conditions. Combustion phasing and work output variations at these conditions are characterized by a pattern in which the combustion phasing alternates between being earlier than the desired timing and l...

Full article: http://www.greencarcongress.com/2014/11/20141130-stanford...

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