A novel hybridized automated manual transmission for high performance cars

Abstract

Abstract-Because of the introduction of progressively more restrictive regulations that aim to reduce fuel consumption and CO2 emissions, the automotive industry is focusing its efforts on environmentally friendly passenger cars. In particular, different electrification roadmaps are pursued by the individual car makers, and electrified drivetrain layouts are progressively introduced into the market. This process involves all vehicle segments, including high performance passenger cars. In this context, this study presents a novel hybridized automated manual transmission (HAMT) for cars with high power characteristics. The HAMT includes six gear ratios associated with the internal combustion engine, and two gear ratios associated with an electric motor. The energy efficiency of the HAMT is measured on a drivetrain test rig, and compared with that of an equivalent dual clutch transmission (DCT). Simulation results based on the experimentally measured efficiency maps show the significant energy consumption reduction of the HAMT in its internal combustion engine mode, with respect to the DCT.

On the Benefits of Active Aerodynamics on Energy Recuperation in Hybrid and Fully Electric Vehicles

“…Additionally, the regenerative torque can also adversely affect the wheel slip tracking performance of the ABS [4]. The reduction in regeneration during ABS interventions also prevents the worst-case scenario in vehicles with an electric axle with one P4 (according to the classification commonly used in the automotive industry, see [5]) EM per wheel. In such a case, if one machine fails to provide the expected braking torque, an uneven torque distribution between the left and right wheels occurs, which creates a direct yaw moment unexpected by the driver.…”