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2014 Nissan Leaf named overall cleanest car in US

A research firm has named the zero-emission 2014 Nissan Leaf the cleanest production vehicle in the US, and that's figuring in the full, wheel-to-well lifetime impact of the car on the environment. The Automotive Science Group (ASG) studied more than 1,300 automobiles with at least four seats across nine categories, measuring everything from the amount of fuel needed to run the car during its lifetime to the extraction of natural resources to build the thing in the first place to end-of-life processing. ASG calls the process "wildly complex." The battery-electric Leaf, with its 84-mile single-charge range, took top honors overall, but there were other highly ranked vehicles in different categories. ASG also said that the Mitsubishi Mirage, with its sub-2,000-pound curb weight and 40 miles per gallon fuel economy, was the cleanest among gas-powered vehicles, while the Chevrolet Spark had the lowest cast of ownership over five years. Last month, the American Council for an Energy-Efficient Economy (ACEEE) put together its annual "Greenest" and "Meanest" (notice: we didn't say "Cleanest") lists and put the Leaf at number three. Topping that list was the Smart ForTwo ED battery-electric, but that was followed up by the Toyota Prius C compact hybrid, so fans of those vehicles can now start a healthy debate. The ACEEE uses data from the Environmental Protection Agency and California Air Resources Board to compile its list. We have ASG's press release below. Life-cycle Assessment of 1,300 Models Reveals Best of 2014 FOR IMMEDIATE RELEASE 4 February 2014 [Santa Rosa, CA] – The Automotive Science Group (ASG) conducted a comprehensive life-cycle assessment of over 1,300 automobiles across nine categories to distinguish the BEST model year 2014 vehicles in environmental, economic, social and "all-around" performance. Auto consumers are now equipped with a car buying guide founded on principled facts, a departure from the notoriously subjective test drive "editor reviews" that have long been the industry norm. Using a unique combination of vehicle data inputs that include conventional specifications as well as ground-breaking social, environmental and economic performance indicators, ASG's back-end algorithms are wildly complex, but the front-end results – meaningful vehicle ratings and distinguished awards – are forthright and consumer-friendly. ASG's Automotive Performance Index is for automotive consumers what Google is for web users.

Is the skill of rev matching being lost to computers?

If the ability to drive a vehicle equipped with a manual gearbox is becoming a lost art, then the skill of being able to match revs on downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. The usefulness of rev matching in street driving is limited most of the time – aside from sounding cool and impressing your friends. But out on a race track or the occasional fast, windy road, its benefits are abundantly clear. While in motion, the engine speed and wheel speed of a vehicle with a manual transmission are kept in sync when the clutch is engaged (i.e. when the clutch pedal is not being pressed down). However, when changing gear, that mechanical link is severed briefly, and the synchronization between the motor and wheels is broken. When upshifting during acceleration, this isn't much of an issue, as there's typically not a huge disparity between engine speed and wheel speed as a car accelerates. Rev-matching downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. But when slowing down and downshifting – as you might do when approaching a corner at a high rate of speed – that gap of time caused by the disengagement of the clutch from the engine causes the revs to drop. Without bringing up the revs somehow to help the engine speed match the wheel speed in the gear you're about to use, you'll typically get a sudden jolt when re-engaging the clutch as physics brings everything back into sync. That jolt can be a big problem when you're moving along swiftly, causing instability or even a loss of traction, particularly in rear-wheel-drive cars. So the point of rev matching is to blip the throttle simultaneously as you downshift gears in order to bring the engine speed to a closer match with the wheel speed before you re-engage the clutch in that lower gear, in turn providing a much smoother downshift. When braking is thrown in, you get heel-toe downshifting, which involves some dexterity to use all three pedals at the same time with just two feet – clutch in, slow the car while revving, clutch out. However, even if you're aware of heel-toe technique and the basic elements of how to perform a rev match, perfecting it to the point of making it useful can be difficult.

Renault names new leaders as jailed Carlos Ghosn bows out

PARIS — Renault appointed Michelin boss Jean-Dominique Senard as its new chairman on Thursday, after Carlos Ghosn was forced to resign in the wake of a financial scandal that has rocked the French carmaker and its alliance with Japan's Nissan. Senard will become chairman immediately, the company said, with deputy chief executive Thierry Bollore taking over Ghosn's other Renault role as full CEO. The appointments may begin to ease a Renault-Nissan leadership crisis that erupted after Ghosn's Nov. 19 arrest in Japan and swift dismissal as Nissan chairman. Senard, 65, now faces the task of soothing relations with Renault's Japanese partner and resuming talks on a new alliance structure to cement the 20-year-old partnership. "It's important that this alliance remain extremely strong," Senard told reporters after a board meeting - citing the mounting investment demands of new vehicle technologies. "It is our compulsory duty to go forward together." Ghosn's exit also marks a clear end to one of the auto industry's most feted careers, two decades after he was despatched by former Renault boss Louis Schweitzer to rescue newly acquired Nissan from near-bankruptcy — a feat he pulled off in two years. After 14 years as Renault CEO and a decade as chairman, Ghosn formally resigned from both roles on the eve of the board meeting. Ghosn's arrest and indictment for financial misconduct has strained the Renault-Nissan relationship, threatening the future of the industrial partnership he transformed into a global carmaking giant over two decades. For two months, the tensions deepened as Renault and the French government stuck by Ghosn despite the revelation he had arranged to be paid tens of millions of dollars in additional income, unbeknownst to shareholders. Ghosn has been charged with failing to disclose more than $80 million in additional compensation for 2010-18 that he had agreed to be paid later. Nissan director Greg Kelly and the Japanese company itself have also been indicted. Both men deny the deferred pay was illegal or required disclosure, while not contesting the agreements' existence. Ghosn has denied a separate breach of trust charge over personal investment losses he temporarily transferred to Nissan in 2008. Ghosn had agreed in recent days to step down from Renault, Reuters reported on Tuesday — but only after the French government, Renault's biggest shareholder, called for leadership change and his bail requests were rejected.