Start-Stop Technology

Discussion in 'Energy' started by Star, Aug 14, 2012.

  1. Star
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    Star Gold Member

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    I didn't know if I should put this information in the 'Environment" or the "Energy" section, "stop-start technology" will be progress for both.



    8 Million New Cars Will Use Start-Stop Technology In Next 5 Years


    Aug 13, 2012


    As automakers stretch to improve fuel economy, consumers will face all sorts of new technology including one that will take some getting used to because it shuts the engine down at red-lights.

    As many as 8 million vehicles sold in the United States will have the so-called "stop-start "technology by 2017, according to a study released by Lux Research, an independent research firm that monitors emerging technologies.

    Stop-start systems are common in Europe, which has long been ahead of the U.S. on fuel efficiency, but so far it is in only a few vehicles in the U.S. Is it worth it? Start-stop can improve fuel economy by as much as 12 percent, according to AAA.

    Here's how it works: Start-stop technology can power down a car's engine when it's idling or when the brakes are applied, such as at a red-light, and returns power in time for acceleration.

    The technology itself is not new - some trucks have used it for two decades. But automakers have advanced it as they search for ways to comply with the 34.1 miles-per-gallon Corporate Average Fuel Economy standard that goes into effect in 2016.

    "This technology is only going to gain momentum," said John Nielsen, AAA's Director of Automotive Engineering and Repair.

    More than 40 percent of vehicles sold in Europe and Japan already use start-stop technology, according to AAA. In the U.S., hybrid cars offer stop-start, and in 2012, a few luxury automakers began offering it in conventional vehicles, notably the BMW 3-series. Kia has also rolling it into the Soul and Rio at the lower end of the price ladder.

    While many automakers, such as BMW and Porsche, offer it as standard equipment, others, like Ford, are offering it as an add-on. The 2013 Ford Fusion, for example, will come with a start-stop option priced at $295.

    Consumers can expect to save an average of $167 per year, the study says, based on 12,000 miles driven per year and $3.75 per gallon prices with an average of 20 mpgs.

    Whether or not consumers accept the technology may be another matter. In some vehicles, the start-stop system operates so seamlessly, the driver may not notice it at all. In others, the lag between starting and stopping is more pronounced. AOL Autos has tested different systems, and has found, for example, that General Motors system, found on the Chevy Malibu Eco and Buick LaCrosse eAssist works almost invisibly, while the system on the BMW 3 Series was a little more pronounced and even rough.

    ✄snip>
     
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  2. flacaltenn
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    flacaltenn USMB Mod Staff Member Gold Supporting Member

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    You can 6% efficiency increase just by changing driving habits and keeping your tires inflated.

    After it's killed a couple hundred people who couldn't get out of the way of an accident and added $$Billions to repair costs and decreased battery life -- people will know who to blame. Won't they?
     
  3. Old Rocks
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    Old Rocks Diamond Member

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    A technology whose time has come. Good for hybrids, good for all vehicles.
     
  4. martybegan
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    martybegan Gold Member

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    Only if it is seamless. In some areas hesitiating even a second when a light changes is a horn honking finger giving offense.
     
  5. uscitizen
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    uscitizen Senior Member

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    That will save millions of gallons of gas in drive thru lanes.
     
  6. martybegan
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    martybegan Gold Member

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    As stated before, to me its a good idea if I get exactly the same performance I get now.

    If not, it can go to hell.
     
  7. uscitizen
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    uscitizen Senior Member

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    Yah yah yah I heard the same thing many times over the years.
    And they wind up driving what is available.
     
  8. martybegan
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    martybegan Gold Member

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    I went back from an anemic 4 cylinder to a 6 after I felt like I was driving a golf cart for 4 years. I only went back to the 4 when the HP and pickup was comparable to the 6 i was giving up.

    I got a car with a CVT, which is somewhere between an automatic and a manual in terms of gas milage, so I am up for new technology, as long as it is a noticable improvement.

    To me a couple of percent more gas milage is not worth hesitation when accelerating from stop, especially driving in NYC.
     
  9. flacaltenn
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    flacaltenn USMB Mod Staff Member Gold Supporting Member

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    It not only has to has transparent performance, but my MAIN concern (other than the death rate) is actually the strain on ALL of the systems. STARTING an engine (and an alternator) with wipers and heaters and lights and stereo all ON is a reliability nightmare. That stuff is running off battery while you're stuck in traffic. In a Bay Area traffic jam with all that load -- you're lucky if you get home.

    Thermal stress is another issue. A couple dozen 4 minutes stops in sub zero weather is gonna stress some materials that otherwise don't have a life issue.

    I'm certainly NEVER gonna buy one of these until there are YEARS of maintenance data available.

    And ya know -- we don't HAVE to go here... Hybrids don't NEED it. And we should be concentrating on fuel cells and hydrogen for EVs anyway..
     
  10. martybegan
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    martybegan Gold Member

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    I would hope these things would be smart enough not to turn the engine off when there is an electric load greater than a certain draw on the battery, and when the battery reaches a certain level.
     

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