VS - Electrical Systems From Stop-Start to Hybridization

Mild-Hybrid architectures

Mild-Hybrid systems are segmented according to their performances for: ●● Electric launching ●● Electric driving ●● Regenerative braking ●● Elec. Boost ●● Hybrid boost

While Mild-Hybrid architectures are numerous common feature remains:

●● Stop-Start ●● Energy recovery (also known as braking recuperation or regenerative braking) ●● Engine-Off coasting ●● Torque assist ●● ZEV mode ( Z ero E mission V ehicle), electrical drive The following scheme illustrates some parallel hybrid architectures with the associated E-machine technologies. E-machines relate to the whole range of electrical machines to cope with new Mild- Hybrid demands, i-StARS belongs to the subfamily of Belt Starter Generator machines, their 48V successors are the so called i-BSG machines.

●● Engine-Off coasting ●● Electric Torque assist

Torque assist also known as boost improves the power train efficiency, notability in urban driving situations, but requires energy. CO 2 emission efforts impose that this electrical assistance benefits from an alternate energy source to the conventional fuel- electricity conversion via the alternator, here comes in play the energy recovery.

Flywheel

Front end

Belt drive

Clutch

Gearbox

E-machine decoupled from the engine and rotating at engine speed

E-machine always linked to the engine

i-StARS/i-BSG Belt Starter Generator

CMG Crankshaft Motor Generator

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