Aerowhatt
Gold Member
Posts: 404
Joined: Wed Jan 28, 2015 1:52 pm

Re: Hypermiling the i-MiEV

Sun Jul 01, 2018 9:17 am

I thought of a quantitative test for this best gear choices for the hypermiling debate.

Using a well known stretch of highway, I used canion to compare two back to back (as identical as possible) runs. One using D and N as needed and the other leaving the car in B the whole time. Both runs I used the same efficient (smooth changes and finessed pedals) driving style. Reseting the trip at the base of the on ramp and taking a screen shot at the stop sign at the end of the off ramp. I found the details interesting. The most important data is the Mi/kWh summary achieved for each run.

Using D and N as needed the result was 9.5 Mi/kWH
pict_2018-06-30_09-32-08.png
Using D and N as needed
pict_2018-06-30_09-32-08.png (120.84 KiB) Viewed 83 times

Using B full time for the run the result was 7.9 Mi/kWh
pict_2018-06-30_09-44-08.png
Using B mode only
pict_2018-06-30_09-44-08.png (121.85 KiB) Viewed 83 times

The bottom line is that D and N as needed resulted in 9.5/7.9 = 120 % the efficiency of the same drive at the same speed under the same conditions in B mode.

On the way home I thought "hey I should have done the test in every drive mode for comparison". I'm curious, so I will go back and compare full time D, E, and B again under the same conditions.

Aerowhatt
2014 cool silver ES, acquired new 4/2015
2014 Labrador Black Pearl ES, acquired new 3/2016

Aerowhatt
Gold Member
Posts: 404
Joined: Wed Jan 28, 2015 1:52 pm

Re: Hypermiling the i-MiEV

Sun Jul 15, 2018 5:34 pm

For completeness I went back and compared E mode and B mode on the same stretch of road. Take note that this was a different day and conditions were different than the conditions in the graphics in the previous post. In the previous post there was a pretty decent headwind. In the following results there was a slight tailwind.

,
thumbnail-2.png
Eco mode only
thumbnail-2.png (90.19 KiB) Viewed 82 times


thumbnail.png
B mode only
thumbnail.png (91.93 KiB) Viewed 82 times


Aerowhatt
2014 cool silver ES, acquired new 4/2015
2014 Labrador Black Pearl ES, acquired new 3/2016

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