Unneeded Automatic Emergency Braking - Again

Discussion in 'Hyundai Kona Electric' started by Toolworker, May 3, 2021.

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  1. herode10

    herode10 Member

    Did you get the recall for brake system software. I had a few experiences of locked brake in emergency stop where I could have stop the car myself. Since the recall, I had a couple more situation of emergency stop and I did not get a brake lock.
    The recall also improve the way the abs react when passing on a manhole while braking. Before, the brake would de-engage. Lot safer now.
     
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  3. hobbit

    hobbit Well-Known Member

    TW, how close do you follow? Like, in seconds?

    _H*
     
  4. Yes.

    Hard to say. Sometimes I do get close, but I am always aware of it. I have never seen an FCA warning from this car, even in those situations. The times the car locked the wheels I was not that close. Action was required but nothing drastic and certainly not emergency intervention.

    As I said above, our local artery is a freeway with frequent exits, and traffic sometimes backs up into a travel lane. The other week, I saw that cars ahead were stopped, and had to brake sharply enough that I checked the rear view mirror. That was much more concerning than the times the car locked the brakes, but there was no FCA warning.

    I've set the warning to Early and will see if that wakes it up. If I knew what kinds of situations bothered it, I might be able to avoid having this happen again - if this really is FCA. But it might not be.
     
  5. BaylorBob

    BaylorBob Active Member

    I'm not having this braking problem - I'm having a Different Braking Problem. I like to set my Car to Auto Hold so it will keep from rolling forward when I come to a stop sign or signal. It was working just fine until a few months ago when it started lurching forward on it's own almost rear ending the car in front of me. I now make sure I stop at least 10 feet behind any other cars because when the car lurches forward it seems to be jumping about 4 or 5 feet. Anyone else have this happen?
     
  6. eastpole

    eastpole Active Member

    I think you are correct to avoid tunnel vision. This is an unintended braking problem and it may be several other systems, rather than FCA. In my family, we've seen this with a Golf that triggered ABS incorrectly when braking gently as I crossed railway tracks, and a Chrysler product that entirely and inexplicably locked up the ABS brakes while cornering, rarely. Both these events were quite a few years back though.
     
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  8. Yeah, you're right, just checked again. The setting descriptor scrolls and I guess I pressed before the Warning word appeared. Anyway, I haven't had an issue for a very long time, so I am leaving everything as is, incl the Sensitivity set to Normal.
     
  9. Recoil45

    Recoil45 Active Member

    When it happens how fast are you letting the gas pedal return?

    In conventional BMWs, the computer watches the gas pedal return speed. If it senses it was fast, the car primed the brakes assuming you will quickly move to the brakes due to an event. Could Hyundai be watching for that and being more aggressive?


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  10. Recoil45

    Recoil45 Active Member

    Good advice in less congested issues, but simply impossible in areas like NYC.


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  11. Depends, when coming up behind someone stopped in traffic, foot is totally off the "gas" pedal, but I don't like to coast too slowly to the car in front, or someone will likely cut in front. But when I was changing lanes, I tromped it to get in the next lane, and that's it when slammed on the brakes.

    But like I keep saying, it hasn't happened to me in a long time. Maybe I have adapted and better at judging when the car will hit the brakes, so I keep outside of that envelope. Or some software update changed how FCA works and made it less premature. There was a brake software update last year, but they never tell you exactly what it is about though.
     
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  13. Update and probably solved:

    I set Forward Collision Alert to Fast. The alert came on maybe half a dozen times in the past 10 months, and I always took action. The car has not braked automatically.
     
    Esprit1st likes this.
  14. It sounds to me that you started accelerating before you had left your lane (which is what we all do in traffic, so no criticism there) and the car ahead was still in your Kona's radar view. It is not smart enough to recognise your diverence from the lane, saw the rapid closure and applied the brakes.
     
  15. Yup. Interestingly though, I have not had that happen again. Not sure if I adjusted my driving, or something changed with all the software updates. Another thing it used to do is buck a bit when holding speed beyond the set cruise speed when passing a car. Doesn't do that anymore either.
     
  16. Ya, one of the many software updates (not sure which one) completely changed the cruise control characteristics. No bucking anymore but there's a big lurch now when you manually override with the pedal and then let your foot off. I actually preferred the old way better.
     
  17. BaylorBob

    BaylorBob Active Member

    I thought the car was going to "STOP" under this setting. I had a rude awakening when the WARNING WAS GOING OFF LIKE CRAZY but the Only thing that stopped me from crashing into the car in front of me was when I stomped on the Brake. I don't think the Left Paddle would have done it. Plus with 60 years of driving experience, I was PROGRAMMED to Stomp on the Brake with my Foot and not to Pull on a Paddle.
     
  18. The emergency breaking has nothing to do with the paddle. You're supposed to stomp on the brake, or, if it's triggered wrongly, you can tap the accelerator to stop it from breaking by itself.
     
  19. BaylorBob

    BaylorBob Active Member

    I usually pull the left paddle to stop the car in normal driving. Rarely use the foot brake. But in the case where my car was about to crash into the car in front of me, I Mashed on That Brake Pedal. The Car was not stopping itself. I see all these commercials for Buicks which cost a lot less than my Car (Sticker Price $52,000) and these Buicks are stopping by themselves to prevent a crash. If my 2021 Kona Ultimate can do the same I haven't seen any evidence of it. If I had not stomped on the brake pedal I would definitely have hit the car in front. Using the Brake pedal I stopped about 1 foot from the other car.
     
  20. I can't speak to the specifics of your particular incident but emergency braking is not designed to stop you from hitting things, it's designed to stop you from hitting things as hard as you otherwise would without braking. As to the Buick example; it's a commercial, it's going to both dramatize and exaggerate. It's possible that GM's emergency braking system is superior to Hyundai's but I wouldn't take advertising as a fair example of its abilities.
     
    navguy12 and electriceddy like this.
  21. navguy12

    navguy12 Well-Known Member

    Perhaps the Buick you mention was using what is colloquially called “smart cruise control” while the commercial was filmed.

    If you have the Hyundai equivalent of “smart cruise control” engaged (TACC in the Tesla world), then your car should stop on its own (within the designed operating envelope of the manufacturer).
     
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