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Old 08-03-2009, 04:47 PM   #3 (permalink)
bwilson4web
Engineering first
 
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Join Date: Mar 2009
Location: Huntsville, AL
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17 i3-REx - '14 BMW i3-REx
Last 3: 45.67 mpg (US)

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Quote:
Originally Posted by Daox View Post
Interesting testing Bob. I know I've asked around about the best way to accelerate with my 04 Prius. The general consensus is that it doesn't matter too much. Try to keep rpms low is the only general rule I've heard.
I'm going to suggest:
  • =< 2,600 rpm - my data indicates excellent efficiency here. Hobbit prefers 2,200 rpm so we're in the same ball park.
  • 2,600-3,200 - good, not as great but OK.
  • 3,200-3,900 - starting to feel the fuel burn
  • 3,900-4,500 (rpm limit of NHW11) - feel the fuel burn
Still, whatever works.

As a general rule, rpm is a rough 1st order indication of power setting. If you have a portable GPS, you could calculate the power vs. rpm settings. Just a fun thing to do and with the fuel burn at a constant power setting, get a rough idea of how much fuel to reach a given speed at any arbitrary power setting. ... and then your head explodes. <GRINS>

Bob Wilson
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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
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