I'm not sure what happened to my answer to wilsonp, but Lud has captured some of my thoughts and comments.
I wrote my earlier post to explain that hybrid systems can charge upon braking somewhat but that most of the braking energy is dissipated as heat. There's so much energy generated during braking that only a small portion is able to be funneled back into the batteries. It's a chemistry/physics thing. I guess it's the same thing why I can't plug my laptop into a 120V outlet and have it recharge in a few seconds.
Most of the recharging that's done by a hybrid, like Honda's Insight, is done during steady-state driving (or by driving down hills) over a long period of time. Once you've depleted the batteries with aggressive driving, then you're running solely on the gas engine. Of course, at this time you're lugging the dead weight of the batteries and motors around the track with you. This was the basis for my original comment on 1 early track session and then crusing at a constant speed.
Of course, no one knows what Honda will come up with, but we have heard that they intend to produce something like the DN-X show car. A 4-door sports sedan might be a perfectly reasonable hybrid. You could get on it every so often on the street - deplete the batteries, and then recharge the batteries during normal driving. It would kind of be like nitrous bottle that would automatically recharge itself over time.
The percentage of people who track their car (even NSX owners) is small indeed, so perhaps the track performance of a 4-door sporty sedan isn't important to Honda. A hybrid NSX (or a S2000) would be a different thing entirely and for the above reasoning, I just don't see Honda going that route.
It is fun, and harmless, to speculate or pre-judge what Honda may or may not be up to. Honda's has always been a design and engineering leader and perhaps they will surprise us. I just don't think it's likely that they'll rewrite physical laws.
-Jim
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1992 NSX Red/Blk 5 spd #0330
1991 NSX Blk/Blk Auto #3070 (Sold)
1974 Vette 454 4 spd Wht/Blk
1976 Honda Accord 5 spd, 3 door Blue/Blue
1977 Honda Accord - Custom - Under Construction
1986 Chevy Suburban
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