e-brake bravery?

  • Thread starter Thread starter hobbit
  • Start date Start date
  • Replies Replies 20
  • Views Views 3K
hobbit

hobbit

Well-Known Member
I found an old thread or two implying that rather drastic things happen
if the e-brake gets pulled at speed. Has anyone done that, hopefully
under controlled conditions that wouldn't endanger life and property?
Is there any sanity-check like with going into P or R? I could easily
see a naive or careless passenger doing that when the driver doesn't
expect the car to suddenly be dragging its butt.

I'm not about to try that until there's snow on the ground or I find a
patch of really loose gravel ... but if this is a real (mis)operational
hazard, I would seriously consider adding a separate enable switch
located well out of harm's way to prevent it.

Stupid design, hands-down.

_H*
 
hobbit said:
I found an old thread or two implying that rather drastic things happen
if the e-brake gets pulled at speed. Has anyone done that, hopefully
under controlled conditions that wouldn't endanger life and property?
Is there any sanity-check like with going into P or R? I could easily
see a naive or careless passenger doing that when the driver doesn't
expect the car to suddenly be dragging its butt.

I'm not about to try that until there's snow on the ground or I find a
patch of really loose gravel ... but if this is a real (mis)operational
hazard, I would seriously consider adding a separate enable switch
located well out of harm's way to prevent it.

Stupid design, hands-down.

_H*
Click to expand...
Never tried that, not that brave, but do let us know;)
Before I paid for the car I did try the park and reverse buttons at about 50 km/h and got an error message only on both (improper shift condition or something like that)
 
Imagine yourself driving on the highway and accidentally pressing the reverse mode??? You'd get ejected through the windshield or strangled to death by the seat belt. :)

I am sure they must have a fail-safe in place to so that Reverse or Park cannot be engaged while the car is moving forward. It'd be crazy to be at mercy of something/someone (a cat? a child?) hitting those buttons while you are driving.

I'll be putting a box on top of those buttons if I ever hear that they can be engaged while driving forward.
 
I remember reading something in the manual about the e-brake. You can pull it while driving and it will slow down the car to a stop. However it has to be constantly pulled. As far as I understand it will be controllable.

I'm not able to pull out the manual right now, so just recalling from memory.

Sent from my moto x4 using Tapatalk
 
Esprit1st said:
I remember reading something in the manual about the e-brake. You can pull it while driving and it will slow down the car to a stop. However it has to be constantly pulled. As far as I understand it will be controllable.

I'm not able to pull out the manual right now, so just recalling from memory.

Sent from my moto x4 using Tapatalk
Click to expand...
I am a little fearful of trying it without consoling with the Hyundai techs and actually reading it in the manual first .
But if it is OK, I will add it to the list when the snow hits the ground and no one is around me. Could be fun:)

Edit : read the manual, three times it mentions not to use the EPB while vehicle is moving as it may cause damage, but a little blurb on page 5-35 says
" If there is a problem with the brake pedal while driving, emergency braking is possible by pulling up and holding the EPB switch. Braking is possible only while you are holding the EPB switch. However, braking distance will be longer than normal"
Good memory Esprit1st;)
 
Last edited:
Actually, this is one of the first things I tried shortly after bringing the car home. The location of the buttons really caught my attention, and curiosity got the better of me. I tried the park and reverse buttons at speed and got some warning on the screen. I don't remember the message (it was almost 5000 miles ago) but nothing happened.

For some reason I never considered trying the ebrake though. In fact, never even thought about it till reading it here.
 
These are electronic controls. I can't believe that the designers would be stupid enough to build these things without some kind of safety function embedded in the system.
 
FlbrkMike said:
These are electronic controls. I can't believe that the designers would be stupid enough to build these things without some kind of safety function embedded in the system.
Click to expand...
Exactly, that's why I went ahead and gave it a try.
I've got to admit though, I did experience a bit of anxiety at the moment of truth .
 
As I posted the question I was also on Techinfo looking for more
data. I did find a couple of seemingly relevant items under the
EPB description of operation, below.

I'll still wait to get onto a more yielding surface before messing
with it, I think. Especially to determine how to get *out* of any such
slowing situation on the fly without having to completely stop.

Who knows, parking-lot donuts might be doable after all..

_H*

=====

5. Electric Controlled Deceleration (ECD)

When EPB switch is pulled in dynamic condition, deceleration is realized
by sending request via CAN to the ESC.

ECD means deceleration will be done via the ESC system, not by EPB Actuator;
Applied to the vehicle with ESC only.

6. Rear Wheel Unlocker (RWU)

This function is for vehicle with no ESC or failed ESC. When EPB switch
is pulled in dynamic condition, dynamic deceleration is generated by EPB
actuator.

Clamp force will be controlled to avoid locking of the rear wheels and
ensure vehicle stability.

7. Auto Apply

With switching off ignition, EPB will automatically apply the brakes.

Auto Apply is disabled when Auto Hold switch is switch off.

The auto engage feature does not activate if the power switch is turned
off while the EPB switch is pressed.
 
Well, I have one more piece of data. Arriving at a trailhead for a
bit of a hike, there was a gravel parking lot with a slight slope and
nobody in it. So just for yucks, I tried stopping "bandit style".

What happens when the switch is pulled at any appreciable
speed [>2 mph?] is a very urgent BEEPBEEPBEEPBEEPBEEP
from the dash, and the rear brakes get applied to a level to
effect a fairly aggressive stop but not to totally lock up the
back end. The key thing is that it *releases* the moment
you let go of the switch -- it doesn't need to be pushed down.

So the dynamics are *sort of* like "yanking the e-brake*, but
a lot less linear as far as control. It's probably still good for
that quick pulse to break the back end loose in a snowy
parking lot. Experimenting with whether disabling the
traction/stability control affects any of this will probably
still wait for real slippery conditions.

_H*
 
hobbit said:
Well, I have one more piece of data. Arriving at a trailhead for a
bit of a hike, there was a gravel parking lot with a slight slope and
nobody in it. So just for yucks, I tried stopping "bandit style".

What happens when the switch is pulled at any appreciable
speed [>2 mph?] is a very urgent BEEPBEEPBEEPBEEPBEEP
from the dash, and the rear brakes get applied to a level to
effect a fairly aggressive stop but not to totally lock up the
back end. The key thing is that it *releases* the moment
you let go of the switch -- it doesn't need to be pushed down.

So the dynamics are *sort of* like "yanking the e-brake*, but
a lot less linear as far as control. It's probably still good for
that quick pulse to break the back end loose in a snowy
parking lot. Experimenting with whether disabling the
traction/stability control affects any of this will probably
still wait for real slippery conditions.

_H*
Click to expand...
You now receive the "E-Brake Award of Fortitude" :)
 
Here's question, does the e-brake button work the same whether you push or pull it? I always pull it, I guess from the hand brake habit.
 
hobbit said:
a very urgent BEEPBEEPBEEPBEEPBEEP
from the dash, and the rear brakes get applied to a level to
effect a fairly aggressive stop but not to totally lock up the
back end. The key thing is that it *releases* the moment
you let go of the switch -- it doesn't need to be pushed down.
_H*
Click to expand...

Thanks, Hobbit! That's better behaviour than I anticipated! Now I just need to line up some snow tires.
 
R P said:
Here's question, does the e-brake button work the same whether you push or pull it? I always pull it, I guess from the hand brake habit.
Click to expand...

You pull to activate it and you push to remove it. You can tell by looking at the e-break icon on your dashboard.
 
At a standstill, yes. When you're moving, simply letting go of
the switch releases the braking and returns to normal. I didn't
actually try pushing down, I suspect it would be a no-op in
that scenario.

_H*
 
You must log in or register to reply here.
Back
Top