Greater dynamics without the weight penalty
THE eTwinster from GKN (right) combines improved dynamics with short-range electric power – without the weight of a full all-wheel drive or battery-hybrid system. It involves an electric rear axle with two Twinster electro-hydraulic clutches, as used in the Ford Focus RS. The electric axle can be independently controlled, improving cornering by torque vectoring. The system can also balance the speed differential between the axles, improve traction under slippery conditions, drive the vehicle and recoup electric power. Magnomatics has come up with Magsplit, which is a light, small, simple and more efficient way to split the power in a hybrid drivetrain. It does away with the flywheel’s dual-mass damper, an EM generator and the gears. They’re replaced by a magnetic transmission: rotating its magnetic field alters a continuously variable ratio between the electric motor and internal combustion engine, or it can lock them together. Oerlikon Graziano has developed a six-speed automatic coupled with a 120kW electric motor and fitted it in a Mercedes-Benz SLS AMG. Called OGeco, it provides torque in-fill, electric boost, regeneration, limited electric drive and engine cranking, without affecting packaging; it takes up the same space as the seven-speed DCT normally fitted to the car.