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      02-11-2010, 02:57 PM   #5
southlight
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Quote:
Originally Posted by Finnegan View Post
Thanks for moving this...yeah, it belongs here.
I have to admit that this wasn't me.

Quote:
Originally Posted by Finnegan View Post
RE: something similar in BMW, I think Footie may have alluded to that at some point along the way as well. I hate to say it (I'm kind of a purist), but I expect you're both right.

If this were done correctly (e.g. hybrid boost for city driving, or for overtaking with end-user control) I could see it not being too intrusive in performance oriented driving. How you'd not mess around with braking feel is the trick though...one would think that when the flywheel spins up you'd "feel" it. Maybe not. (Braking in a hybrid really stinks for performance oriented driving at present.) If the flywheel gets around this, then again, maybe performance driving dynamics wouldn't suffer too much.

It seems this is one way car makers can keep higher power vehicles on the road while meeting CO2 and fuel economy restrictions.
BMW prefers the way of using batteries/caps to the flywheel system. I'm not that sure about pros and cons of each technology. The flywheels probably weigh less than respective battery packs.

Adding to Footie's post, I see one disadvantage of e-motors powering the front wheels, and that's weight balance. The 911 GT3 R hybrid has a rear engine layout, the VED was a mid engine setup. In these cases it makes perfect sense to have the hybrid system up front avoiding to bring any more weight to the rear. Considering that all BMWs are front-engine layouts, adding the hybrid system to the front might not be that good of an idea, though. In these cases it would make more sense to have the e-motors and the batteries near the rear axle. Anyways, I'm just thinking out loud and might miss something here.


Best regards,
south
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