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Originally Posted by Double-Trinity
Sorry abuot that, you're right, I meant power, and elecrtical transmission from the sun generator to the ring motor (or vice versa).
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got it, thanks!
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Originally Posted by Double-Trinity
As far as I know there is not electrical->chemical->electrcal phase, unless power is being stored into the battery. Most of the time, it is simply transferred from one motor directly to the other without passing through the battery.
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i may be mistaken about the battery being in the loop. even so, at higher road speeds my understanding is that the electrical inefficiencies would be around 30%, mainly due to impedence at those higher voltage levels.
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Originally Posted by Double-Trinity
The solution to this would be to implement the ability to have a separate true gear. Some eCVT designs (which still go by the name elecrtic CVT) have multiple gears for this reason.
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yeah, i understand that daimler/gmc are working on a system that basically has two power split devices thereby offering a second fixed gear optimized for higher highway cruising speeds. the problem i see with this is the added complexity of the system. i suppose an easier solution would be to do what they did with the camry and put in a larger ice that could handle the power requirements at higher cruising speeds - of course now you're on a slippery slope...
i guess i'm inclined to say that psd is not a true cvt b/c of this speed limitation problem. i mean the whole purpose of cvt is to optimize the rpms of the engine at any cruising speed. obviously a belt and pulley system doesn't have this limitation at 80mph or even 100mph (provided the proper gear ratios exist). if hsd is having to artificially rev the ice more at higher speeds just to make up for the inefficiencies of the electrical system then i can't seem to get myself to consider it a true cvt...
not withstanding this, hsd is a beautiful system.