2014 Toyota Prius Three on 2040-cars

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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:

Are you the facelifted Toyota Yaris?

As basic transportation goes, there's not a lot to complain about with the Toyota Yaris. The five-door hatch (not to mention its JDM cousin, the Vitz) are due for upgrades, though, having toddled along in its current form since the 2011 model year. Now, we have what looks to be leaked images of the new Yaris, straight from a Japanese brochure.
The next-gen Yaris was previewed in Frankfurt by the Yaris Hybrid-R Concept. Surprisingly, both the standard version and the RS (shown above) share a strong resemblance with the Frankfurt concept. That gaping lower intake remains, while a pointy, sharp front end shares a resemblance with the new Aygo city car (though the Yaris won't have a giant X on its face like its smaller cousin). The lower intake is flanked by a pair of what we're guessing are non-functional grilles, which house the fog lights. There are only a few small images of the rear of the car, which looks more like an evolution of the current five-door hatch.
The interior looks rather racy, with a small, thick-rimmed, leather-wrapped steering wheel and black cloth seats with red contrast stitching. There's a bright red button to the right of the steering wheel on this right-hand-drive JDM model, which could indicate the arrival of pushbutton start. Under hood of this Mazda-built Toyota should be a Mazda Skyactiv engine. That gives us hope that this latest Toyota compact will be imbued with some sense of driving fun.

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.