Analysis of CO_2 reduction potentials and component load collectives of 48 V‑hybrids under real‑driving conditions

摘要

The development of innovative powertrain technologies is crucial for car manufacturers to comply with decreasing CO_2emission limits. They face the challenge to develop products which fulfill customer requirements in terms of functionality,comfort and cost but also provide a significant CO_2 efficiency improvement. 48 V-hybrids can achieve these conflicting goalsdue to their low vehicle-integration effort and system costs while substantially increasing powertrain efficiency. The varianceof real-driving scenarios has to be considered in system development to achieve the maximum customer benefit with thechosen system design, such as installed electrical power or topology. This paper presents a comprehensive investigation ofdifferent 48 V-system designs under real-driving conditions. The influence of varying real-driving scenarios on componentload collectives is analyzed for P1 and P2 topologies. Furthermore, the CO_2 reduction potential and the influence of differenthybrid functions such as electric driving is identified. The contribution of this paper is the identification of 48 V-systempotentials under real-driving conditions and the corresponding component requirements, in order to support the developmentof customer-oriented 48 V-systems.