Quote:
Originally Posted by rmay635703
Find me a 220cc motor with the same BSFC range as the TDI you quote
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That 95% is only for the driveline, not BSFC. Find me a gen set that is 95% efficient...
Some of these posts are so long my A.D.D. is kicking in.
If you look at the path of power the explosion of fuel in the cylinder takes to get the torque to the road to make the whole mess move, direct mechanical drive gets the win.
You only get to attach all these conditions to the pros and cons of how to get there.
A serial genset is the most "plug-n-play" but it isn't the most efficient. As rmay points out, if it keeps a guy outta a Ram, it is more efficient. But if it keeps a guy outta an EV capable of all the range needed, or an EV with a proper parallel ICE, or even just a very efficient ICE vehicle, it is less efficient. That was the bone I had to pick with the otherwise excellent Zing trike.
How frequently is this auxilliary power unit going to be called upon? How much capability i.e. range and performance does the APU need? Does it have to be readily available at all times or is one allowed to go home from wherever and get the APU? How user friendly or idiot proof does the APU have to be? This is exactly what the hybrid engineers especially the Volt guys have had to wrestle with.