Concept development begins with the ‘voice of the customer’. Customer requirements and performance targets establish the basic boundary conditions of a Weichai America product development program. Advanced systems engineering harmonizes air, fuel, exhaust, cooling, and controls with proven base engine hardware. Detailed component studies and 3D models of power systems in end use applications optimize the design for each customer’s mission. Extensive validation in dyno and in the field prove the robustness of the product design.