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This course introduces students to the fundamentals of engine exhaust emissions, including their formation mechanisms, their sources, and their effects. The students will be familiarized with the present emission control technologies and future challenges. The topics covered include: engine emissions and air pollution, review of emission regulations, emission control systems, catalyst fundamentals, and catalyst-based engine after treatment techniques for gasoline, diesel, and lean-burn engines, discussion of cold-start emission control and breakthrough catalytic technologies.