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2013 Ford Fusion Hybrid
The all-new 2013 Fusion Hybrid has proven be very popular for Ford

Source: Ford





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By Philippine Mango on 1/31/2013 11:39:34 PM , Rating: 2
when the epa comes out with results proving ford cheated much like hyundai....




RE: popularity will fall through the floor when.....
By Mint on 2/1/2013 7:25:35 AM , Rating: 2
I dunno, Ford seems really confident in their results. It happened after the Hyundai fiasco, so they knew that if they lied, someone would find out, so I doubt that they did.

What I think is really happening is that the software onboard is recognizing the EPA test loop and doing some optimizations. Why such optimizations help the EPA test so much over general driving (it's like 20%!) is beyond me. All cars do a little better with the EPA cycle than in real life, but not this much. I'm hoping some curious owner tries some slight variations of the EPA cycle (e.g. swapping segments) to see what breaks the detection.


RE: popularity will fall through the floor when.....
By Manch on 2/1/2013 11:48:48 AM , Rating: 2
http://www.caranddriver.com/features/the-truth-abo...

Someone linked this article in a previous discussion about the whole Ford EPA mpg fiasco. The article states that they punch in drag coefficients and the lot to adjust the friction on the rollers but while that's all fine and great they cant possible account for all of the other variables. I don't see why they don't combine there dyno test with an on track test. It also talks about how hard it is to stay within the threshold to get the scores they do. Still the posted numbers vs real-world are really off so something up.


By Mint on 2/4/2013 9:20:54 AM , Rating: 2
There's nothing wrong with doing the test on a dyno. The difference between doing a test on rollers and the real world is minimal if reasonable coefficients are used, particularly for city driving because aerodynamics is only responsible for maybe 20% of drag. A car on the dyno experiences the same engine losses, rolling resistance losses, and energy to accelerate. I bet you that if you followed the EPA test precisely on real roads, you'd get within 5% of the dyno test.

The question is why Ford is doing so well for the particular acceleration/coasting/braking sequence in the EPA test. I would love to see someone experiment with that, e.g. rearrange some parts of the city cycle to see if that beaks some software optimization that kicks in when it detects the beginning of the EPA sequence.


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