• JordanZ@lemmy.world
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    1 month ago

    Longer wheelbase vehicles don’t rotate quite as quickly so you have a lot more time to correct before things go haywire. They finally started to get the hang of the brakes and manually pulsing them near the end. At the beginning every time he locked up the brakes it just rotated more.

    ABS doesn’t really help here because it works by a difference in speed between the wheels. If they’re all locked up then there is no difference.

    • H4mi@lemm.ee
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      1 month ago

      Correct, this would be a job for ESP which has more input data, like steering angle, and can brake the wheels individually. This bus does not have it.

      • JordanZ@lemmy.world
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        1 month ago

        On large super slick surfaces ABS doesn’t really work. It might pulse for a second or so but eventually all the wheels stop moving and the system thinks you stopped even though you’re very much still sliding.

        ABS is usually fairly loud and you can feel it pulse the pedal. If you’re on ice and that stops happening, then chances are you locked up all the tires and you should let up and reapply. Repeat as necessary until you actually stop.

        ABS usually works okay in winter because your car isn’t entirely on a sheet of ice and there is some variance in the road surface beneath all the tires with differing friction levels.

        • Buddahriffic@lemmy.world
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          1 month ago

          Yeah, this has been my experience. I’ve got ABS on my current car but in winter the main advantage they provide is letting me know when it’s time to pump the brakes if I need to come to a stop. The times I haven’t pumped, let’s just say I was lucky that no one else was going through that intersection at the time.

          I suspect they are tuned to avoid locking up the wheels in conditions other than ice/slick snow and the pulse is too quick for the tires to get traction when it releases.

      • TBi@lemmy.world
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        1 month ago

        Yep if all the wheels are locked up it just thinks you are stationary, ABS only kicks in if there is a difference like it front wheels lock but back wheels are rolling. Smarter systems (like on bikes) would also monitor motion.