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Thread: In Electric Vehicles, the 'Gas' Is Also the Brake

  1. #1

    In Electric Vehicles, the 'Gas' Is Also the Brake

    No way I could drive like that. I can't even imagine driving like that.

    (NEWSER) – It's one of the lines that gets beat into every teenager's brain in driver's ed: Brake left, gas right. But in our new electric-vehicle world, that sentence could use an upgrade. That's because what was once the gas—the proper term for EVs is accelerator—is now also the brake. Electric motors run as generators; pressing down on the accelerator sends electricity to the motor to move the vehicle forward, while lifting off the pedal actually charges the battery as the momentum of the car turns the motor, reports Forbes. This is called "regenerative braking," and it conserves energy, which in turn extends the vehicle's range. The car's default setting can have more or less regeneration, and when there's more, easing off the gas slows the car dramatically, even to a full stop.

    Nissan is really pushing this with its new Leaf, due later this year, by introducing an "e-Pedal" feature where lifting off the accelerator will bring the car to a complete stop, even on hills. (Yes, there's still a backup brake for what Wired calls "panic stops," but the magazine notes it's totally unnecessary.) Forbes reports that early on in the game, the regeneration settings in EVs were set to more closely mimic the experience of traditional cars; the Leaf's touting of the e-Pedal shows how the thinking has changed. And that change brings real benefits: For one, regenerative braking reduces stopping distances, because the braking begins as soon as you start to raise your foot, rather than after you've shifted all the way to the brake.
    http://www.newser.com/story/246281/i...the-brake.html
    Quote Originally Posted by Ron Paul View Post
    The intellectual battle for liberty can appear to be a lonely one at times. However, the numbers are not as important as the principles that we hold. Leonard Read always taught that "it's not a numbers game, but an ideological game." That's why it's important to continue to provide a principled philosophy as to what the role of government ought to be, despite the numbers that stare us in the face.
    Quote Originally Posted by Origanalist View Post
    This intellectually stimulating conversation is the reason I keep coming here.



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  3. #2
    Kinda weird for people who are used to stamping on the brake pedal in emergencies. Apart from that, I guess it's logical. It's no longer an accelerator pedal but becomes more of a "how fast do you want to drive pedal".
    "I am a bird"

  4. #3
    No, it's not logical. Logical would be coasting when the accelerator is released. Regenerative braking could be triggered by the brake pedal. Just set it up so the first half of brake pedal travel activates the regenerative braking, and the lower half of the brake pedal's travel also activates the friction service brakes.

    Somebody's overthinking this. Nissan wants us to retrain ourselves so we'll know for sure we have an electric and can be all proud of ourselves for being green. The wiser carmakers will not expect us to relearn how to drive, but allow us to save energy by coasting just as we do now.

    Nissan has spent its whole corporate life chasing the 'kinda weird' market. That's why Toyota outsells them. They keep this up, and everyone will be outselling them. Brake pedals can activate two different kinds of braking systems. Hudson figured that out in the 1930s. Time for Nissan to catch up to Hudson.
    Last edited by acptulsa; 07-30-2017 at 09:56 AM.
    Quote Originally Posted by Swordsmyth View Post
    You only want the freedoms that will undermine the nation and lead to the destruction of liberty.

  5. #4
    I have an exhaust brake on my truck. When engaged, it slows my truck when I let off the accelerator.

    I love it. Saves me from yearly brake replacement.

  6. #5
    Driving cars with manual transmission is going to be a lost art.

  7. #6
    Quote Originally Posted by timosman View Post
    Driving cars with manual transmission is going to be a lost art.
    Already is.

    Driving will be a lost art for most people in another twenty years.

  8. #7
    Quote Originally Posted by acptulsa View Post
    No, it's not logical. Logical would be coasting when the accelerator is released. Regenerative braking could be triggered by the brake pedal. Just set it up so the first half of brake pedal travel activates the regenerative braking, and the lower half of the brake pedal's travel also activates the friction service brakes.

    Somebody's overthinking this. Nissan wants us to retrain ourselves so we'll know for sure we have an electric and can be all proud of ourselves for being green. The wiser carmakers will not expect us to relearn how to drive, but allow us to save energy by coasting just as we do now.

    Nissan has spent its whole corporate life chasing the 'kinda weird' market. That's why Toyota outsells them. They keep this up, and everyone will be outselling them. Brake pedals can activate two different kinds of braking systems. Hudson figured that out in the 1930s. Time for Nissan to catch up to Hudson.
    Notch 8 to notch 1

  9. #8
    Quote Originally Posted by The Northbreather View Post
    I have an exhaust brake on my truck. When engaged, it slows my truck when I let off the accelerator.

    I love it. Saves me from yearly brake replacement.
    One the reasons I loved driving that diesel VW in traffic.

    While the 2 liter TDI did not have a "jake brake", just the drag alone meant that with careful gear selection you could maneuver in stop and go traffic without hardly touching the brake.



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  11. #9
    Quote Originally Posted by acptulsa View Post
    No, it's not logical. Logical would be coasting when the accelerator is released. Regenerative braking could be triggered by the brake pedal. Just set it up so the first half of brake pedal travel activates the regenerative braking, and the lower half of the brake pedal's travel also activates the friction service brakes.
    That's basically how a Prius works.

    But they do have an element of the OP idea in that when the accelerator is completely released, it does switch to a minimal regeneration mode and will slow. There is also a "B" selector which is like down shifting on a down hill road. It turns up the regeneration even more, slowing the vehicle on a downhill without touching the brake pedal.

    Last edited by Brian4Liberty; 07-30-2017 at 01:55 PM. Reason: Damn autocorrect.
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  12. #10
    Quote Originally Posted by Anti Federalist View Post
    One the reasons I loved driving that diesel VW in traffic.

    While the 2 liter TDI did not have a "jake brake", just the drag alone meant that with careful gear selection you could maneuver in stop and go traffic without hardly touching the brake.
    Are you crazy? People who even know what gears are are all mansplaining, manspreading, masculinist rapists and beneath consideration.

    Never mind that their pointless and downright dangerous-seeming antics cut down brake wear, and brake wear spreads asbestos dust all through the atmosphere. If brakes were really made of asbestos, and asbestos dust were really a poisonous carcinogen, the insurance lobby would have already lobbied Congress to outlaw brakes, and raised their rates accordingly.

    Gears! Gears are oppression! Down with downshifting! We all have a right to mesothelioma!
    Quote Originally Posted by Swordsmyth View Post
    You only want the freedoms that will undermine the nation and lead to the destruction of liberty.

  13. #11
    Quote Originally Posted by acptulsa View Post
    Are you crazy? People who even know what gears are are all mansplaining, manspreading, masculinist rapists and beneath consideration.
    Gears are sexist cis scum patriarchs.

  14. #12


    Quote Originally Posted by Ron Paul View Post
    The intellectual battle for liberty can appear to be a lonely one at times. However, the numbers are not as important as the principles that we hold. Leonard Read always taught that "it's not a numbers game, but an ideological game." That's why it's important to continue to provide a principled philosophy as to what the role of government ought to be, despite the numbers that stare us in the face.
    Quote Originally Posted by Origanalist View Post
    This intellectually stimulating conversation is the reason I keep coming here.

  15. #13
    Quote Originally Posted by Suzanimal View Post


    R
    ...
    Never attempt to teach a pig to sing; it wastes your time and annoys the pig.

    Robert Heinlein

    Give a man an inch and right away he thinks he's a ruler

    Groucho Marx

    I love mankind…it’s people I can’t stand.

    Linus, from the Peanuts comic

    You cannot have liberty without morality and morality without faith

    Alexis de Torqueville

    Those who fail to learn from the past are condemned to repeat it.
    Those who learn from the past are condemned to watch everybody else repeat it

    A Zero Hedge comment

  16. #14
    Quote Originally Posted by Swordsmyth View Post
    R
    ...
    Good catch. I had to look up the answer.
    Quote Originally Posted by Ron Paul View Post
    The intellectual battle for liberty can appear to be a lonely one at times. However, the numbers are not as important as the principles that we hold. Leonard Read always taught that "it's not a numbers game, but an ideological game." That's why it's important to continue to provide a principled philosophy as to what the role of government ought to be, despite the numbers that stare us in the face.
    Quote Originally Posted by Origanalist View Post
    This intellectually stimulating conversation is the reason I keep coming here.

  17. #15
    Quote Originally Posted by Suzanimal View Post


    Bah! They don't get to call that a "square" and then tell me I'm wrong if I say the answer is "six" ...

  18. #16
    Everything old is new again...

    I spent a short time operating trolley cars at Seashore Trolley Museum in Kennebunkport Maine.

    Electric trolley cars were the first vehicles to use regenerative braking, well over a hundred years ago.

    When you "notch down" to come to a stop, the wheel truck motors are switched into "regenerative" mode, the current being passed back up the "trolley pole" and into the supply grid.




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  20. #17
    Quote Originally Posted by Occam's Banana View Post
    Bah! They don't get to call that a "square" and then tell me I'm wrong if I say the answer is "six" ...
    Check your geometry privilege. Those rectangles identify as squares.
    Quote Originally Posted by Ron Paul View Post
    The intellectual battle for liberty can appear to be a lonely one at times. However, the numbers are not as important as the principles that we hold. Leonard Read always taught that "it's not a numbers game, but an ideological game." That's why it's important to continue to provide a principled philosophy as to what the role of government ought to be, despite the numbers that stare us in the face.
    Quote Originally Posted by Origanalist View Post
    This intellectually stimulating conversation is the reason I keep coming here.



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