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Japan plans real-world diesel emissions test after companies fail

Japan's transport ministry plans to start real-world diesel emissions tests after an experiment found four models from Toyota, Nissan, and Mitsubishi that produced more nitrogen oxide (NOx) emissions than the nation's rules allow, according to The Japan Times. Regulators there usually only perform emissions checks in the lab. The VW diesel scandal has everyone double-checking their figures. Diesel versions of the Toyota Hiace van, Land Cruiser Prado, and Nissan X-Trail produced up to 10 times more NOx than allowed. The Mitsubishi Delica D:5 was up to five times over the limit, The Wall Street Journal reports. There was no evidence of defeat devices in the vehicles. Mazda performed well in the experiment, though. The CX-5 passed with nearly the same results on the road and in the lab. The Demio, better known as the Mazda2, did nearly as well with only slighter higher figures in the real world than in the controlled setting. The experimenters theorized the reason for the excessive emissions was that cold weather caused the engines' software to shut off the exhaust gas recirculation to prevent damage, according to the WSJ. However, this behavior also increased NOx production. Toyota, Nissan, and Mitsubishi don't have to worry about punishment from the transport ministry because this check was just an experiment. Their models already passed the mandated lab tests, which was the only requirement, according to The Japan Times. As governments begin greater real-world emissions tests, the results suggests diesels aren't very clean. A recent check in France found models from Ford, Renault, and Mercedes-Benz that didn't perform up to the standards. Regulators in India conducted similar evaluations and ordered VW to recall over 300,000 vehicles. Related Video:

Toyota to buck engine downsizing trend, may go larger and turbo-free

Turbocharging isn't really Toyota's specialty, and the Japanese automaker isn't being shy about acknowledging it. Koei Saga, a senior managing officer in charge of drivetrain research and development, says that eschewing turbos and increasing displacement of engines using the Atkinson cycle can produce better power gains without sacrificing fuel economy, Automotive News reports.
Toyota is investing heavily in larger-displacement Atkinson-cycle engines in addition to turbocharged engines, but Saga doesn't think the automaker will use turbocharging across many product lines. He apparently remains unconvinced that the technology "makes the world better."
In Toyota's eyes then, Atkinson cycle engines do make the world better, and here's how. Their pistons complete four processes - intake, compression, power and exhaust - in one revolution of the crankshaft, and the power stroke is longer than the compression stroke. Traditional Otto cycle engines require two crankshaft revolutions to accomplish those same four operations and have equal-length compression and power strokes. Atkinson cycle engines are more efficient, but less power dense, though increasing displacement can offset that shortfall.

Ford tumbles to second worst in Consumer Reports reliability survey, list dominated by Japanese [w/video]

It's no secret that MyFord Touch has had its share of problems since being introduced, but the most recent reliability survey from Consumer Reports shows just how much this infotainment system has affected Ford. Just two years ago, the automaker was in the top 10 for the institute's reliability rankings, but since then, it has tumbled to the second-lowest rung just above dead-last Jaguar. In addition to MyFord Touch, CR also attributes a handful of new products that have had issues right out of the gate.
Compiled from 1.2 million subscriber surveys, this year's auto reliability survey heavily favors Japanese automakers, with eight of the 10 spots hailing from Japan. Toyota brands grabbed the top three spots (Scion, Toyota and Lexus - in that order) with Mazda, Subaru, Honda and Acura filling the next four spots. The only non-Asian automaker cracking the top 10 was Audi at number eight.
Audi climbed a total of 18 spots from last year, and Cadillac and GMC round out this year's top gainers breaking into the top 15. Helping Cadillac's upward movement, the CTS Coupe was named the most reliable domestic car. Lincoln, Volvo and Chrysler join Ford on this year's biggest loser list.