Intertek expands its existing engine development location in San Antonio, TX, with a testing facility to increase capacity and add a second U.S. EPA Part 1065-compliant constant volume sampling (CVS) system. The expansion accommodates heavy-duty diesel engines on both on- and off-highway emissions cycles and will provide a testing and validation solution for development and emissions. The company’s CVS system will be shared by two transient test cells and increases the range of ac dynamometers to 900 hp (671 kW). The improved facility allows Intertek to accommodate larger aftertreatment components, test equipment, and accessories. Test cells are serviced by temperature- and humidity-controlled combustion air, test cell ambient control, and Coriolis-effect mass flow meters, and a variety of communications protocols with powertrain controllers are combined with unattended mapping to improve testing efficiency.