The Advanced Combustion Engine research and development (R&D) subprogram within the DOE Vehicle Technologies Office (VTO) provides support and guidance for many cutting-edge automotive technologies under development. Research focuses on addressing critical barriers to commercializing higher efficiency, very low emissions advanced internal combustion engines for passenger and commercial vehicles.

This report describes the progress made on the research and development projects funded by the Advanced Combustion Engines subprogram. Past years' reports are listed on the Annual Progress Reports page.