MGU-H (TERS)

[gitane]

Looking at 2014 engine I see that the MGU-H is driven from the turbo. This may account for the size of the turbo on the Renault engine. I have heard also that the MGU-H may also be used as a motor to spin the turbo. Anyone else heard this?

Any other details or links on the subject?

Laissez les bon temps rtoulez! G

[riff_raff]

Using the turbo spool to capture/return energy to the propulsion system is less complex and lighter weight than other approaches. The turbo spool is de-coupled from the drivetrain, so there are fewer control and dynamic stress issues. Plus the turbo spool operates at very high speeds, which means the mass of the motor/generator is much smaller than previous electric KERS devices that were mechanically coupled to the engine via gear train.

[autogyro]

The original KERS system MGU-K is still fitted however.
To be specific the motor /generator for the MGU-K is connected to the crankshaft with a set of gears.