View Single Post
Old 01-15-2009, 06:55 PM   #7 (permalink)
Master EcoModder
roflwaffle's Avatar
Join Date: Dec 2007
Location: Southern California
Posts: 1,490

Camryaro - '92 Toyota Camry LE V6
90 day: 31.12 mpg (US)

Red - '00 Honda Insight

Prius - '05 Toyota Prius

3 - '18 Tesla Model 3
90 day: 152.47 mpg (US)
Thanks: 349
Thanked 120 Times in 79 Posts
The driver was going way to fast to see an improvement. At 70mph they aren't going to pick up much if anything in the way of a difference between optimal engine efficiency and engine efficiency cruising at that speed.

That said, it does work AFAIK, but the only way to get decent testing conditions for most vehicles is to "Pulse" up a hill, and let DFCO do the job on the way down, w/ much lower average speeds. Unfortunately this requires a pretty steep hill, but it works AFAIK, it's just that there needs to be a significant difference in engine efficiency cruising in gear at whatever speed compared to optimal engine efficiency.
  Reply With Quote