View Single Post
Old 09-10-2012, 09:38 AM   #69 (permalink)
pete c
Master EcoModder
Join Date: Oct 2011
Location: ellington, ct
Posts: 829
Thanks: 44
Thanked 104 Times in 80 Posts
Originally Posted by Shepherd777 View Post
Hi JB -
We have decided that the new truck will be electromotive power. A Cummins diesel engine powering a generator powering hub motors. No tranny or differential. Not a hybrid, no batteries. Batteries are not mature and cost too much, especially for a Class 8 truck. We are designing the truck with a battery bay so they will hopefully be plug-n-play when low (lower?) cost batteries become available.
What is the efficiency of spinning a generator to spin electric hubs? I would think it is considerably lower than a conventional drivetrain. Trains have done it for years, but, the reason is that no one can figure out how to build a beefy enough clutch.

I do think this idea can work as soon as battery technology gets to the point where it is practical. This would be a huge advantage in hilly areas. Just think of how many megawatts of power get turned into noise through jake brakes every day. Sure would be nice to turn it back into stored electrons for the next uphill.
  Reply With Quote
The Following User Says Thank You to pete c For This Useful Post:
gone7 (11-24-2012)