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Toyota engineer warns automous cars could increase fuel use, urban sprawl

An increasing number of people are starting to consider the potential downsides of a transition to autonomous cars. The FBI is already looking at them for the potential ill effects on law enforcement, and a scientist for Toyota is raising the possibility that driverless vehicles could actually be detrimental to the environment over the long term.
Ken Laberteaux, who studies future transportation for Toyota, thinks that autonomous cars could lead to more pollution, not less, says Bloomberg. However, Laberteaux's theory isn't so much based purely on science as it is considering behavioral and historical trends. "US history shows that anytime you make driving easier, there seems to be this inexhaustible desire to live further from things," said Laberteaux during a presentation at the Automated Vehicles Symposium in San Francisco, CA, cited by Bloomberg.
Laberteaux's belief is that if commuters can make their drives easier, then they will be more willing to live farther away from the cities where they work. The end result would be more urban sprawl and increased pollution from the longer travel times.

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.

Toyota Tells Dealers To Stop Selling Six Models

Toyota has told North American dealers to stop selling six popular models with heated seats because the fabric doesn't meet flammability standards. One soft material beneath the seat covers does not comply with U.S. safety standards, company spokesman John Hanson said. No fires or injuries have been reported, but Toyota can't legally sell cars that don't comply with U.S. safety codes, Hanson said. The company is still totaling how many vehicles are affected, but it will be in the thousands, according to the spokesman. The stop-sale order could mean trouble for Toyota and its dealers because it covers the company's top-selling vehicles. Dealers can no longer sell certain Camry, Avalon, Sienna and Tacoma models from the 2013 and 2014 model years, as well as Corollas and Tundras from 2014. The Camry, for instance, is the top-selling car in the U.S. with more than 408,000 sales last year. It depends on how long the repairs will take. Hanson said the company already has a new material that's being installed at factories and will be put in cars that are on dealer lots. "We don't think it will take long to get the parts and make the changes," Hanson said, without getting more specific. As for vehicles already on the road, Hanson says Toyota has reported the problem to the U.S. National Highway Traffic Safety Administration, which will decide if the sold vehicles should be recalled. A NHTSA spokesman said he would check into the matter. "We don't believe that there is a safety issue here because there have been no reports of any problems," Hanson said. The stop-sale order affects cars and trucks distributed to dealers in the U.S., Canada and Mexico. In addition, some vehicles were exported outside North America, Hanson said. The problem was discovered by safety regulators in South Korea, who disassembled seats and tested individual fabrics, Hanson said. U.S. safety standards require fabrics to resist flames at a certain rate, but the one fabric didn't meet the standard, Hanson said. Toyota spokesman Naoki Sumino in Japan said the affected vehicles were sold since August of 2012, when the fabric supplier was changed. Toyota has been struggling to regain its once sterling reputation for quality after announcing massive recalls over several years, starting in 2009, for a variety of defects including braking, accelerators and floor mats. The company was fined for being slow on recalls, which affected more than 14 million vehicles, and faces lawsuits.