Magna's System Approach for 48 V Mild Hybrids

Authors

Dipl.-Ing. (FH) M. Hofer, Dr. T. Hackl, Dr. G. Schlager, MAGNA POWERTRAIN Engineering Center Steyr, St. Valentin

Year

2017

Print Info

Fortschritt-Berichte VDI, Series 12, No 802

Summary

To achieve the ambitious fleet emission values of no more than 95 g CO₂/km from 2021, the automotive industry is focusing on the electrification & hybridization of powertrains, reducing traction resistance and optimizing new vehicle architectures. A key step in achieving this goal is electrification in the engine and powertrain sectors. The introduction of the 48V onboard power supply offers great potential for cost-effective electrification of auxiliary units, which can be operated in a demand-optimized manner. In the field of engine development, Magna is strongly committed to the fields of thermal management and air path, as shown by the current market launch of a 48V main water pump with a power range of 1 kW, and the development of an electric compressor (5-7 kW) for performance enhancement in the area of engine supercharging. Other components currently made suitable by Magna for 48V include electronic radiator fans and transmission oil pumps, which are also used for lubrication and cooling of electric axle drives. An electric rear axle equipped with an innovative high-speed concept completes Magna’s ever-expanding portfolio of 48V components. Through fully electric coasting in traffic, a CO₂ reduction is achieved, especially in metropolitan areas with heavy traffic (and often, high air pollution). In addition to electrically driven parking maneuvers, the 25 kW 48V e-axle also offers the additional dynamics and safety advantages of a part-time all-wheel drive for low speeds and a powerful start-up aid and snow chain replacement. In the field of transmissions, GETRAG offers an innovative solution with a 25kW 48V hybrid transmission integrated into the vehicle in P2 architecture, in order to safely meet the challenging future objectives of emissions legislation in combination with the above-mentioned 48V products.