ENTERPRISE is a computer simulation tool to model both the thermodynamic processes in the engine and the mechanical components of the powertrain. It can model the effects of turbocharger selection, timing control, air-fuel ratio control, torque converter characteristics, gear ratio, rotating inertias, vehicle weight, hydraulic demands, etc. on a vehicle over a desired course or load cycle. There is good agreement between the model and vehicle data. Enterprise has been used to design engines and powertrains to improve response and reduce driveline failures.