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The Lean Gasoline Di Without Denox-Cat
Published May 21, 2003 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Spring Conference
The high potential of Controlled Auto Ignition with gasoline engines~to combine excellent fuel economy with extremely low engine-out emission~is already known from various basic research approaches. The real challenge, however, is the practical application under real-world-operating conditions and typical production constraints. The Controlled Auto Ignition System AVL CSI was designed in view of minimum changes to existing production engines, large volume production feasibility and cost effectiveness. While keeping the fuel economy benefit of lean unthrottled operation, the CSI reduces by a partially variable valve train and a cylinder-pressure-controlled EMS the NOx engine-out emission towards such an extent that future emission limits will be met even without DeNOx catalyst.