The University of Houston Texas Diesel Testing & Research Center provides comprehensive R&D and testing of advanced powertrain and emission aftertreatment technologies for federal, state, and local governments, as well as the fuels, engine, and aftertreatment industries. The center, part of the university's Cullen College of Engineering, performs services including pre-verification testing, technology screening, optimization of technologies, fundamental and applied research, concept development, and technology demonstrations. The facility's main components are a 500-hp (373-kW) ac chassis dynamometer test cell, a 600-hp (447-kW) ac engine dynamometer test cell, a portable emissions measurement system, and a research laboratory comprised of benchscale reactor systems and analytical capabilities. Tests focus on reducing NOx and particulate matter emissions from diesel exhaust, as well as emissions from renewable biofuel. The center also studies how fuel economy is impacted with these new technologies.