Carlo Cavallino

TL;DR: In this article, the advantages due to the adoption of multi-speed transmission systems within fully electric vehicles are described, and the results show that there is a significant advantage in adopting a 2-speed transmissions system over the single-speed layout, and despite a reduction in motor losses, the typically lower efficiency characteristics of Continuously Variable Transmissions do not result in lower energy consumption for the four case study vehicles.

TL;DR: In this article, the authors present a four-speed transmission system that can be concurrently driven by two electric motor drives, for use in fully electric vehicles or electric axles for through-the-road parallel hybrid electric vehicles, which allows the electric motors to work in their high efficiency region for a longer period during a typical driving schedule.

TL;DR: The selection of the gear ratios for the multi-speed application is described in detail for a case study vehicle, for two different electric motor units.

TL;DR: In this article, the first and second coupling devices are both shiftable between an open condition and a closed condition independently of each other; the first coupling device is normally open, whereas the second coupling device are normally closed.

TL;DR: In this paper, a parallel hybrid electric drivetrain concept, based on the integration of an electric motor drive into a relatively simple six-speed automated manual transmission, is described, which actuates the torque-fill function through control of the electric motor torque during the gearshifts.