View Single Post
Old 08-12-2009, 01:41 PM   #1 (permalink)
bwilson4web
Engineering first
 
bwilson4web's Avatar
 
Join Date: Mar 2009
Location: Huntsville, AL
Posts: 843

17 i3-REx - '14 BMW i3-REx
Last 3: 45.67 mpg (US)

Blue Bob's - '19 Tesla Std Rng Plus
Thanks: 94
Thanked 248 Times in 157 Posts
Calibrating the 2010 Power Bar (ECO mode)

Hi,

Last night was too overcast to watch the meteor show so I took a couple of runs up Brindley Mountain with our Garmin GPS to get more hybrid system indicator (HSI) energy display data. In particular, I wanted to check the 75% and 100%, Eco band points:



NOTE: the clear cover causes a parallax error from the 8", cell phone camera. From the driver's head position, the yellow electrician tape markers look right.

I ran two climbs holding either 100% of the Eco bar or 75% and got these results:



The 100% Eco mode, 23.4 hp, came pretty close to my earlier, flat-land acceleration test. The 75% level was off, 15.3 vs. 12.8 hp, but I knew my earlier acceleration tests were somewhat dependent upon a few samples over a short interval. I have good confidence in the 15.3 value.

I have the data in a spreadsheet if there is any interest in seeing how I did
it.

Because this was a new procedure, I failed to record the fuel consumption rate. I'll have to go back and repeat it. However, at 100% of Eco bar, the car went up at an average of 35 mph (56 kph) but only 25 mph (40 kph) at 75%. The posted speed limit is 65 mph (104 kph) so it needs to be done when there is little traffic about and with the safety blinkers flashing. I am very uneasy about trying 50%, Eco bar power.

Bob Wilson

__________________
2019 Tesla Model 3 Std. Range Plus - 215 mi EV
2017 BMW i3-REx - 106 mi EV, 88 mi mid-grade
Retired engineer, Huntsville, AL
  Reply With Quote