keywords Automotive engineering Battery electric vehicle CLUTCH Costs DESIGN DYNAMIC PERFORMANCE Discrete cosine transforms EFFICIENCY ENERGY-CONSUMPTION EV gearboxes Engineering Engineering, Electrical & Electronic GEAR SHIFT QUALITY Gears MANUAL TRANSMISSION Magnetic gears OPTIMIZATION POWERTRAIN Science & Technology Synchronization TORQUE Technology Telecommunications Torque Transportation Transportation Science & Technology gear ratio design gearbox controlling multi-speed gearbox shifting schedule