Hi,
Quote:
Originally Posted by gpsman1
On 35 miles per hour or 40 miles per hour 4 lane roads, I do a lot of P&G in my FEH in the 25 to 42 miles per hour range. If there is light traffic behind me, I do 30-40 MPH.
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So is this correct:
- 25-42 PnG ~= 33 miles per hour average?
Quote:
Originally Posted by gpsman1
. . .
I usually net 10% better ( 44 MPG vs. 40 miles per hour ) compared to steady driving.
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I think you are suggesting:
- 33 miles per hour -> 40 MPG
- 25-42 PnG ~= 44 MPG
Interesting, I'm see an 11% improvement with 25-43 PnG and your report is a 10% improvement. This is well within the margin of error.
I haven't done a sensitivity study to plot the sensitivity of PnG high-low speed values and the relative improvement over steady-state. However, it looks like something worth testing in the spring when 'standard days' return.
Quote:
Originally Posted by gpsman1
. . . I account some of it to thermal effects. The fewer number of minutes my ICE is on, the fewer minutes I am dumping heat into the radiator/environment... and by running the ICE water at 140'F with P&G vs. 188'F with constant on, there is slower heat loss to the environment by conduction/radiation... yes?
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An interesting hypothesis and worth testing.
Bob Wilson