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Anyone ever used the EPA database to find road load HP vs. Fuel Economy?

Anyone ever used the EPA database to find road load HP vs. Fuel Economy?

Anyone ever used the EPA database to find road load HP vs. Fuel Economy?

(OP)
I am trying to find some data with corresponding road load horsepower and fuel economy values so I can do some examples for calculating BSFC. This data seems particularly difficult to find/read. I found these two links:


EPA Road Load DataBase xl Files
EPA Road Load Data Explained pdf

I can read the data and I have gone to the explanation pdf file. I even referred to 40 CFR part 600, but I haven't been able to figure it out. I can keep digging, but I'm hoping to benefit from someone else who has already figured this out. Has anyone sorted through the data/headings and been able to find values of road load horsepower and fuel consumption that correlate? i.e., a 2010 Camry developes 21hp while getting 32mpg? And, knowing the speed would be a bonus!

Brian

RE: Anyone ever used the EPA database to find road load HP vs. Fuel Economy?

(OP)
Based on a little more searching, it would appear that there is no data in those files for steady state/cruising/steady hp conditions. If I am wrong please let me know.
Brian

RE: Anyone ever used the EPA database to find road load HP vs. Fuel Economy?

I wasn't able to open a .dat file, but based on the explanation, the data you need are the dynamometer coefficients a, b & c. These are used to set the road load curve, as a function of speed, in the dynamometer test.
For further information, I suggest you lookup the SAE methodology for determining and applying the road load coefficients, SAE J1263.

"Schiefgehen wird, was schiefgehen kann" - das Murphygesetz

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