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Ford finds flex-fuel engine design plays big role in emissions output

How bad is ethanol for your engine? There's been a lot of debate on this issue as the US considers upping the biofuel content in the national gasoline supply from 10 percent (E10) to 15 percent (E15). The ethanol industry and some scientists say higher ethanol blends show no "meaningful differences" in new engines while the oil industry says ethanol creates health risks. Researchers working at the Ford Research and Innovation Center decided to take a closer look at how a wide range of gas-ethanol blends - E0, E10, E20, E30, E40, E55 and E80 - affected the emissions coming out of a flex-fuel 2006 Mercury Grand Marquis. To see the full report, printed in the journal Environmental Science & Technology, requires payment, but there is an abstract and Green Car Congress has some more details. The gist is that, "with increasing ethanol content in the fuel, the tailpipe emissions of ethanol, acetaldehyde, formaldehyde, methane, and ammonia increased." At least NOx and NMHC emissions decreased. The researchers say that the effects are due to the fuel and "are expected for all FFVs," but that the way that a manufacturer calibrates the engine will affect NOx, THC, and NMOG emissions. It's this last bit that's important, since the researchers found, "Higher ethanol content in gasoline affects several fundamental fuel properties that can impact emissions. ... These changes can have positive or negative effects that can depend on engine design, hardware, and control strategy. In addition to direct emissions impacts, higher ethanol content fuel can also provide more efficient combustion and overall engine operation under part-load conditions and under knock-limited higher-load conditions." So, as we head towards more ethanol in our fuel supply (maybe), manufacturers are going to need to learn how to burn it most efficiently.

Submit your questions for Autoblog Podcast #321 LIVE!

We're set to record Autoblog Podcast #321 tonight, and you can drop us your questions and comments regarding the rest of the week's news via our Q&A module below. Subscribe to the Autoblog Podcast in iTunes if you haven't already done so, and if you want to take it all in live, tune in to our UStream (audio only) channel at 10:00 PM Eastern tonight.
Discussion Topics for Autoblog Podcast Episode #321
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2015 Ford Focus ST zooming toward Goodwood reveal [w/video]

Ford has quite a party ready for the Goodwood Festival of Speed starting on June 27. Not only is the 2015 Mustang going to be driving in front of the European public for the first time, the Blue Oval is also unveiling its 2015 refresh for the Focus ST.
Official details about the latest Focus hot hatch are practically nonexistent at this point. Ford's teaser image shows narrower headlights, and the company says that the ST also benefits from the technical and quality improvements from the refreshed standard model, which likely means an even more Aston-Martin-like grille. However, any improvements for the power or handling are a mystery for now.
Ford will even give visitors to the festival the chance to drive the new ST - at least virtually. Gran Turismo 6 kiosks will be on hand with the hot hatch loaded up to race the Goodwood Hill Climb. There will also be real-time races between former Stig Ben Collins in the real ST challenging a player up the hill in the game.