“We test with a minimum of 30 units in our own fleet. Items need to be driver-proof. Items need to be robust and not break down, especially if it takes a unit out of service.” 

Vice President of a large fleet

Powertrain includes the cooling system, accessories, engine, transmission, hybrid system, driveline, and aftertreatment. Given that this system provides the power for the vehicle, many choices can be made in this area to improve freight efficiency.  Many of them are hard to recognize, as they may be internal to the engine, transmission, and other components.  These choices, such as gearing, engine parameters, and cruise controls, help ensure the vehicle is designed for its specific duty cycle and for performing the work required in the most efficient manner.