Ferrari Mailing List: Re: MGU-K & MGU-H

[George (ygpz4re]

"excessively boring post"???  I don't *THINK* so!  Is it just that I'm dumber than everyone else, or does anyone else also feel just a little bit smarter every time they read what Rick wrote??

Thanks Rick!

gp

> Hello friends,
> Any of you studied the MGU-H part of ERS? It has one really novel bit. But first, an ERS overview...
> MGU-K (Motor Generator Unit - Kinetic) is just a generator/motor on the petrol engine crank that utilizes otherwise wasted kinetic energy, say, under braking - or even adding to braking since in generator mode, the MGU-K absorbs kinetic energy. (Given clandestine electronics, could this not be a form of ABS?) Under acceleration, the unit functions as an electric motor adding power to the petrol engine's output.
> MGU-H (Motor Generator Unit - Heat) is also a generator/motor bit but on the turbocharger. I can see why they call this a Heat device but I think that's really a misnomer since it too is using kinetic energy, just from the turbo shaft rather than the crank. Anyway, the MGU-H generates electricity from otherwise wasted turbo speed. Said another way; When the turbine is attempting to spin faster than the compressor needs, say, when the driver lifts. As such, its a mechanical waste gate - just without wasting the kinetic energy as excess pressure.
> The clever bit that caused me to write this excessively boring post is that the MGU-H also acts as a motor to spin up the compressor before the turbine comes into full play. Therefore the MGU-H helps negate turbo lag! That's pretty cool! If '80s era 911s had that, their back ends wouldn't pass their front ends quite as often!
> Okay, back to your regularly scheduled program, already in progress.
> -rickHappy Connecting. Sent from my Sprint Samsung Galaxy S? 5