Neil -
Quote:
Originally Posted by NeilBlanchard
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Series/serial hybrids have several big advantages over pure parallel-only hybrids:
The ICE *should* be run at a single RPM driving a fixed load. (Which is is not how the Volt uses it -- the Volt is not an ideal series/serial implimentation.) This makes several things possible:
This lets the engine be optimized for that one RPM, and we all know that this is ideal situation -- for parallel hybrids, too. (They run best at highway speeds when they don't need to use their transmission.) So, in the case of an Atkinson cycle ICE, this means it can always be at about 38% efficiency.
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I love the concept of the series-hybrid because of the single-RPM BSFC sweet-spot argument. However, it seems like no one has made one for "normal" 4-wheeled cars. Do you think we could extrapolate the specs of an FVT eVaro into a 4-wheeled 4-passenger equivalent and see what MPGe it gets?
CarloSW2