eWHR box approach: from component development to system testing in the real world and synergies with future drive train

Modern long haul trucks utilize about 40% of the fuel energy for propulsion, the remaining is dissipated into the environment as waste heat. Increasing the vehicle overall efficiency is of high importance – for OEMs due to upcoming CO2 legislation [1] and for end customers to reduce the total cost of ownership. Harvesting the waste heat by means of a Rankine cycle is considered as the biggest single measure to fulfill these targets.