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    AutoblogGreen Q&A with Transonic Combustion: Can supercritical fluids give a 30% mpg boost?

    Given that the traditional four-stroke Otto-cycle engine piston engine only has a thermal efficiency of 25-30 percent, there is clearly still plenty of room for improvement. While most of the green automobile attention in recent years has been focused on electrification, liquid fuels still have ...

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    Why the sub-30 MPG claim for Chevrolet Volt is misleading [w/video]

    Translogic Episode 5.4 – Click above to watch video after the jump
    One of the last big technical questions about the 2011 Chevrolet Volt is how much gasoline it will consume when the engine starts up to sustain the charge of the battery. Since the beginning of the development program ...

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    General Motors' wind tunnel turns 30, more important than ever

    2011 Chevrolet Cruze in the GM wind tunnel – Click above for high-res image gallery
    Thirty years ago this week, General Motors opened its first full-scale wind-tunnel at its Warren, MI, technical center. Today, the facility is more important than ever. As automakers strive to hit new fuel ...

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    Deep Dive: Getting intimate with the 2010 Honda CR-Z's powertrain

    When the 2011 Honda CR-Z hits the streets this Fall, it will feature the latest iteration of the company's Integrated Motor Assist (IMA) mild hybrid system. The basic concept of IMA hasn't changed since the original Insight debuted in 1999, but it has been refined to improve performance and ...

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    Greenlings: How do hybrids and electric vehicles blend regenerative and friction braking?

    Following last week's announcement by Toyota that it would recall several hundred thousand units of the 2010 Prius and Lexus HS250h to update the brake control software, there have been numerous questions about how these systems work. Vehicles with strong hybrid systems like those built by ...

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    Some 3rd-gen Prius owners complaining about brakes; here's what might be happening

    2010 Toyota Prius - Click above for high-res image gallery
    2009 has not been a good year for Toyota. After getting its first full year loss in seven decades, it faced its biggest safety recall ever over unintended acceleration caused by floor mats and or throttle control software. Now, as the ...

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    VIDEO: Watch live as ABG goes for a first drive in the Chevy Volt this Sunday!

    Chevy Volts on 1,200 mile drive - Click above for high-res image gallery
    Here at ABG, we've been tracking the progress of the Chevrolet Volt since before the concept debuted in January 2007. Along the way we've spent plenty of time with various members of the Volt team and last spring we were ...

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    Why does mileage drop in winter?

    This week's Greenlings topic came to us from another reader tip. Don asked why his fuel economy suffers so much in winter weather. In his own experience, mileage drops about 10 percent when the temperatures go from the 60-70 F range to near freezing. This is consistent with our own experience and ...

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    Editorial: Henderson's fuel cell 10X cost comments are out of context

    The other day we reported on an interview with General Motors CEO Fritz Henderson published in the Washington Post. While most of the discussion focused on the bailout and bankruptcy, from the perspective of this site, the main items of interest were Henderson's responses to questions relating ...

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    Beware the biodiesel-ready Scorpion! 2011 Ford Super Duty gets all new 6.7-liter diesel V8

    2011 Ford "Scorpion" Power-Stroke 6.7-liter diesel V8 - click above for high-res image gallery
    Ford's ongoing issues with its long-time heavy duty diesel engine supplier, Navistar, will soon be coming to an end. The 2011 edition of the Ford Super Duty pickups will get an all-new, in-house ...

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    POLL: LEAF, Volt or neither? Which do you prefer?

    We got a note the other day from Lyle Dennis over at GM-Volt about a poll he's running among his readers following this week's announcement of the Nissan LEAF. Lyle wanted to judge the readers preference among the two electrically-driven cars. As a site that's been dedicated to all things Volt ...

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    VIDEO: Before you weld a Volt, you have to stamp out the bodies

    Volt body panels being stamped - Click above to watch the videos after the jump
    The other day we pointed you at a video produced by General Motors that is part of a series on the building of the pre-production Chevy Volt prototypes. That video showed the IVER (integration vehicle engineering ...

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    VIDEO: See how prototype Chevy Volt bodies are built

    Volt prototypes being built - Click above to watch the videos after the jump
    Right now, the crew at General Motors pre-production operations center at the Warren Technical Center is in the midst of building 75 Chevy Volt IVER prototypes. IVER – integration vehicle engineering release ...

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    REPORT: Toyota iQ to underpin smartly dressed Aston Martin Cygnet

    Toyota iQ-based Aston Martin Cygnet concept
    Even supercar and luxury GT makers are finally starting to think green. Bentley is trying out E85 and possibly working on a hybrid. Same goes for Ferrari. Lamborghini is even adopting solar power, at least for its factory. The latest premium brand to ...

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    Review: 2010 Audi A3 TDI, diesel with a healthy dash of sport

    Audi A3 TDI – Click above for high-res image gallery
    Audi started its big push for clean diesel here in the U.S. market this spring when its big Q7 TDI finally went on sale. While the Q7 TDI is one of the most fuel efficient seven-passenger SUVs available anywhere, it's only the beginning ...

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    Quick Drive: Nissan EV-02 prototype

    Nissan EV-02 prototype - click above for a high res gallery
    Among the world's high-volume manufacturers, two stand apart from the crowd in their efforts to bring battery electric vehicles to the masses. Nissan and Mitsubishi have been diligently developing EVs, and traveling the world to sign ...


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