Development of a Ultra-low NOx Emission and High Efficiency Gasoline Engine with CAI/HCCI Combustion
Researchers: Dr. J. Li, M. Martins
Supervisors: Prof. H. Zhao, Dr. T. Ma, Prof. N. Ladommatos
Sponsors: Jaguar, EPSRC, Ford Motor Company
Achievements
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The world first multi-cylinder CAI gasoline engine
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Ultra-low NOx emission (100 times reduction)
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Very low CO emission (up to 40% reduction)
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Improved fuel economy
Operating Principle
Residual gas trapping by negative valve overlap.
(Left) Rapid Combustion (Right) Low cyclic variation
Ford 1.7litre, 4-cylinder, PFI Gasoline. CR=10.5, MPI, Twin VCT camshafts
(Left) Reduction in NOx emissions by CAI Combustion
(Right) Reduction in BSFC (%) by CAI Combustion
(Left) Reduction in CO emissions by CAI Combustion
(Right) Increase in HC emissions by CAI Combustion
