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Five automakers now being investigated by NHTSA for airbag woes

It appears that Toyota's renotification to owners of recalled vehicles from last year is just the tip of the iceberg for what could potentially be a much larger industry-wide recall. The National Highway Traffic Safety Administration is opening a preliminary evaluation investigation into roughly 1.1 million vehicles from Chrysler, Honda, Mazda, Nissan, Toyota and parts supplier Takata regarding faulty airbag inflators in several models.
NHTSA has received six reports - three directly, two from Takata and one from Toyota - of vehicles with ruptured airbag inflators from 2002-2006, which resulted in three injuries. So far, all six incidents have occurred in high humidity areas like Florida and Puerto Rico. According to Toyota's latest recall announcement, the inflators may have an improper propellant that could cause it to rupture in a crash and the bag to deploy abnormally.
This new investigation follows a previous recall from April 2013 of about 3.4 million vehicles worldwide for the airbag inflators from Takata. As Autoblog reported, Toyota jumpstarted the new situation when it found that the original list of serial numbers for the faulty part was incomplete and discovered more cars in need of replacement. Honda and Nissan told us that they were investigating whether further models would need called in again as well. Mazda told Autoblog: "Regarding the current Takata situation, we're working closely with NHTSA and investigating the situation, but nothing else to report at this time." Chrysler Group responded to us with the statement: "Chrysler Group engineers are conducting the appropriate analysis. The Company will cooperate fully with the National Highway Traffic Administration."

Infiniti's new VC-T changes the rules of small turbocharged engines

The upcoming Infiniti QX50 crossover does not get our pulse racing, no matter how shapely the QX Sport Inspiration concept that previews it may be. No midsize SUV does, to be fair. But it has something special under the hood – the world's first production variable-compression-ratio engine. That means the QX50's 2.0-liter turbo four, which makes 268 horsepower and 288 pound-feet of torque, will have up to 27 percent better fuel economy. Here's how it works. The trend of moving to smaller, turbocharged engines carries with it one big falsehood. Under low load when the turbo isn't needed, these engines are less efficient than an equivalent engine without a turbo because of the low compression ratio the turbo requires. That is, if you never need the extra power, you're wasting fuel. Turbocharged (and supercharged) engines use a lower compression ratio to prevent detonation. When you force extra air in a cylinder and mix it with fuel, it's more likely to prematurely go boom. Lowering the compression ratio prevents this problem, but it's less efficient. Infiniti's VC-T promises the best of both worlds, with a compression ratio that ranges from 8.0:1 for high-power turbo needs to a 14.0:1 ratio for fuel-sipping efficiency. At its heart the VC-T engine is a simple idea, but it's complicated to explain. Consider yourself warned. The photo below from Infiniti serves as a good visual overview. For the truly nerdy, this patent application covers the mechanical concept. Instead of having the pistons connected to the crankshaft, Infiniti's engine has a pivot arm with a connection on each end. One end connects to the piston, the other connects to a second lower shaft, which is controlled by an actuator arm. At any given time the engine's pistons move up and down according to the lobes on the crankshaft. But the actuator arm can change the angle of the pivot arm up and down. That is, the pistons still move in the same motion with the same stroke, but phase the entire stroke up or down. Move the pivot up and there's less room at the top, which means a higher compression ratio. Move the pivot down and the compression ratio goes down, too. As an added bonus, the lower shaft eliminates the need for counter-rotating balance shafts. Infiniti says this system works constantly and can vary the compression ratio to any number between 8:1 and 14:1. It also uses electronic variable valve timing on the intake valves to switch into Atkinson-cycle combustion for greater efficiency.

Renault ousts CEO days after Nissan gets a new one

Newly-appointed interim CEO Clotilde Delbos and Chairman of Renault SA Jean-Dominique Senard. / Reuters   PARIS — Renault ousted chief executive Thierry Bollore on Friday, as the French carmaker and its Japanese partner Nissan seek to rekindle their alliance following the scandal-hit tenure of former alliance supremo Carlos Ghosn. Tensions between Renault and Nissan, which picked a new CEO on Tuesday, have been high since Ghosn's arrest in Tokyo last year on allegations of financial misconduct, which he denies. Bollore, who was close to Ghosn and had strained relations with Nissan's previous boss, will be replaced on an interim basis by Renault finance director Clotilde Delbos. With new faces at the helm, Renault chairman Jean-Dominique Senard is hoping to draw a line under almost a year of turmoil and revive cooperation between two carmakers once seen as destined to fully merge. That is vital at a time when auto markets are slowing and carmakers are having to invest in costly new technologies as well as meet challenging European emissions regulations. "We're at a new stage now for this alliance. Sometimes you need new management ... to breathe new life into things," Senard, who was brought in earlier this year from tyre maker Michelin, told a news conference in Paris. He said three members of Renault's 18-strong board abstained in the vote to remove Bollore, who hit out at his looming dismissal in a newspaper interview the night before, calling it a coup. Following Ghosn's arrest, a feeling of stagnation around joint Renault-Nissan projects, including on issues such as advancing on cost savings, had begun to set in, people at Renault have said. These would now be the first priority, according to a source close to the carmaker. "There are a lot of concrete matters that have already been identified, including on the industrial front: working on batteries, electric vehicles, connectivity, purchasing and self-driving cars," the source said. Shares in Renault closed up 5.1%. 'Coup de force' Tensions between Renault and Nissan were further inflamed this year, including during various spats over governance reforms, and after a failed deal to pair Renault up with Fiat Chrysler, which withdrew a merger offer. Senard reiterated on Friday that a tie-up with Fiat, which was abandoned in June, was not at present on the agenda.