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Toyota TRD Pro lineup coming next week

A mysterious Toyota commercial recently popped up on YouTube teasing a new TRD Pro lineup for the Tundra, Tacoma and 4Runner, and now we're getting our first official word straight from the automaker on the matter. Courtesy of its Facebook page, Toyota is promising that the TRD Pro models will be introduced on February 6th, ready to "conquer the great outdoors."
This date just so happens to mark the first day of the always-truck-friendly Chicago Auto Show, so while Toyota isn't saying as much, we're almost certain the trucks will show up next week in the Windy City. It's not clear what sort of upgrades TRD Pro brings, but it definitely includes black wheels and a tweaked front end featuring a thick, single-bar grille and bold lettering in place of the stylized Toyota logo (shown above on the Tundra).
Scroll down to see the video, and head over to Toyota's Facebook page to see a teaser image of the 4Runner TRD Pro.

NHTSA investigating 561k Toyota Prius hybrids for possible steering shaft defect

The Detroit News is reporting that the National Highway Traffic Safety Administration will investigate some 561,000 Toyota Prius models for potentially defective steering shafts. The affected hybrid models are from the 2004-2009 model years. The story indicates that NHTSA is weighing whether or not to grant a defect petition, which claims that Toyota incorrectly assembled the hatchback's steering linkage.
As of this writing, there is no recall. However, a recall based on the Prius steering shaft would be the third related to steering issues for the model since 2006. Seven years ago, Toyota recalled 170K Prius models for potential cracking of the intermediate shafts, and in November of 2012, the automaker recalled 670K units to replace the steering shaft extension assembly.
We'll be monitoring NHTSA's signals to see if this investigation turns into a full-fledged recall. For now, stay tuned.

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.