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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.

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Focus ST diesel variant coming, just don't look for it here

A few years back, Volkswagen made some waves when it announced the Golf GTD - a diesel-powered car that, aside from its ultra-efficient, ultra-torquey engine, was identical to the gas-powered GTI. That meant cosseting sport seats, larger wheels, sportier suspension, larger brakes and a body kit that made the GTD indistinguishable from the GTI, except for the three little letters on the back and in the grille.
Now, Ford is looking to replicate VW's success, with a diesel version of the Focus ST. According to Motor Trend, the diesel-powered ST will use a 2.0-liter, 182-horsepower four-cylinder. With an unspecified amount of torque on offer (we'd guess around 280 pound-feet), the diesel hot hatch should hit 62 miles per hour in about eight seconds.
The report, which originally comes from Auto Express, claims the ST Diesel was confirmed by Ford Chief Marketing Officer Mark Fields during this week's Geneva Motor Show. Not surprisingly, it doesn't appear there are any plans to bring a diesel-powered Focus of any kind to the US, let alone one that uses the suspension, steering and other items from the ST. Of course, if there's an official confirmation from Ford, we'll be sure to report on it.