Mercedes-Benz is hard at work developing and implementing alternative powertrains to address the challenge of reducing consumption. Implementing a 48V on-board electrical system will definitely make a major contribution to achieving fleet targets. Compared to other methods of electrification, a 48V system represents a cost-effective and easily integratable way to realize fuel-saving hybrid functions such as recuperation, start/stop capability, and coasting. Aspects such as improved starting comfort and a new driving experience with better agility at low speeds can also be achieved with the 48V on-board electrical system. In addition, introducing a second voltage level has the potential to safeguard the increased power requirements of the increasing number of electric consumers. An up to four times higher electrical power promotes further innovation and is a host of new functions. Depending on the performance limits of a system, the future may also see such options as better climate control, electric park assist, and an electric booster compressor. Not all 48V systems are alike, however. Different solutions, each of which has its own benefits and drawbacks, lend themselves to different sets of requirements and vehicle classes. Figure 16 offers an overview. All things considered, a 48V system with a belt driven starter generator represents the most direct and affordable approach because it can be easily integrated in existing vehicle structures and therefore has the ideal entry-level hybridization architecture for compact and lower mid-sized vehicles. Advanced development to create an industry standard could further reduce the costs associated with a BSG and hold the key to hybridizing vehicles for a large number of customers. The side-by-side system is at the level of the BSG in terms of performance but places greater emphasis on minimizing consumption A decisive design benefit is the lack of engine drag loss thanks to its transmission-side arrangement, allowing the system to partially achieve the functions of a full hybrid at comparably low cost The integrated starter generator is a higher-performance variant and lends itself to high-end vehicles This type of system has roughly the same potential to reduce CO2 emissions as the SBS system while offering more flexibility to accommodate new and enhanced functions such as eCool, eHeat, and an electrified roll stabilizer.


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    48V at Mercedes-Benz – options for further applications

    Timmann, Michael / Renz, Martin | Springer Verlag | 2014


    48 V at Mercedes-Benz - options for further applications

    Timmann,M. / Renz,M. / Daimler,Stuttgart,DE | Kraftfahrwesen | 2014


    High-cost options featured by Mercedes-Benz

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    Meiners,J. / Koeth,C.P. / Mercedes-Benz,Stuttgart,DE | Kraftfahrwesen | 2011