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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.

NHTSA closes investigations into Ford Taurus, Hyundai Santa Fe

Ford and Hyundai are out from under the scrutinizing eyes of the National Highway Traffic Safety Administration after the government agency said it was closing investigations against both automakers over vehicle safety concerns.
Ford was being investigated for reported damaged speed control cables on Ford Taurus (shown above) and Mercury Sable models, both built between 2000 and 2003. Vehicles with the company's Duratec engines allegedly failed to allow owners to brake as expected. Owners lodged 100 complaints and were involved in five accidents, according to NHTSA records. The American automaker responded to the reports, and on June 21 of this year, said that it would inspect and repair all affected vehicles, regardless of the mileage.
Hyundai was under investigation for a reported loose fastener on the steering shaft of its 2011 Santa Fe (shown in the gallery below). After NHTSA launched its inquiry, the Korean automaker responded with its own investigation that yielded four affected vehicles. Following the inspection of 680 vehicles at its assembly plant, Hyundai said the issue was due to employee error and that no further defects have been found.

Are you a new Ford Mustang SVO? [w/video]

When Ford announced that its 2015 Mustang would arrive with a 2.3-liter EcoBoost four-cylinder engine, three letters came to mind: SVO. While Ford hasn't said a word regarding the rebirth of a Mustang SVO model, this latest set of spy shots shows us something very, very interesting. Allow us to explain.
The Mustang prototype in these photos looks very similar to the GT500 test cars we've spotted before - same bulging hood, aggressive front fascia and air vents aft of the front wheels. What's different, however, is around back. Have a look at the exhaust, and note that instead of the GT500's usual quad pipes, two of the exhaust outlets have been capped off.
Our spies point out that these exhaust outlets could be closed for some sort of emissions testing or another engineering reason, but it's also important to note that the engine and exhaust notes of this car sound completely different from earlier GT500 prototypes. We've got a video below that compares the two.