Is there any regenerative braking? If not, it seems like you could attain this on a vehicle with a manual transmission with a little programming of the ECA control unit.
I can see that instantaneous mpg would be better with your system when the assist was working, but wouldn't mpg at low load decrease? (because extra power is needed to charge the batteries).
I would like to see some blind testing. Many persons can get 10-20% over EPA ratings by driving an unmodified vehicle with economy in mind. How about placing a cover over the ECA display and have a 3rd party turn the device on or off for a whole tank- then the tank mpg could be posted on a website as tank 1, 2, 3... Then the 3rd party reveals which tanks had the ECA on and which tanks had the ECA unplugged.
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