Abstract
Diesel powertrains are very well accepted in the market due to their high efficiency, resulting in very attractive cost of ownership figures combined with excellent low-end torque and drivability. To also cope with future RDE requirements in India, the after-treatment system needs to be enhanced, which results in added costs. This paper will focus on the capabilities of a mild Hybrid 48V system to support on emission compliance and reduce extra costs and complexity of the after-treatment system. Using the example of a Hyundai i30 concept vehicle with a 1.6L Diesel engine supported by a 48V Belt-Starter-Generator (BSG), the way towards RDE compliance and benefits in further fuel consumption reduction will be elaborated. The concept as well as its proof by means of RDE measurement results will be discussed. A NOx conformity factor improvement by around 30% has been achieved. This paper will be concluded with an outlook on future potential with a more integrated 48V solution moving towards a P2 configuration and an adapted beltless base-engine.