Is there something wrong with my traction control ?

[fredthepostman]

I have a 2010 and I have experienced some odd behavior a couple of times from my car. On both occasions I was coming to a stop and as I was braking. Each time I came across a (pot hole) in the road. Even though I was braking and coming to a stop, the car decided to give gas to one or both of the wheels and propelled me almost into the intersection. Is this normal? I know if the roads were slippery I would have gone through the stop sign and an accident would have happened.

[jay_man2]

http://priuschat.com/forums/gen-iii-...n-braking.html

Braking problem


Help Diagnosing Unintended/Uncommanded Acceleration Issue

[nineinchnail1024]

I had this feeling twice. It didn't feel so much like the car accelerated, just that the brakes released for a split second. I never experienced this in my Gen II.

[georgew]

I'm pretty sure this is a known behavior of the Prius and is an effect of the braking system switching from regen to disc....somehow need to find a way to anticipate and react accordingly when it occurs.

[32kcolors]

Normal behavior.

[darkleafar]

Hold on a second...I understand that it seems like everyone knows about this (well, almost everyone) and that it is a well documented and well known problem. However, a problem like this should have been fixed by now, considering this problem has been around since the Gen II models. Hopefully, nothing has happened to anybody. Unfortunately, I can think of more than one instance in which a person or animal could be seriously injured due to this problem. God forbid, but imagine you are driving into your garage, there is something in the way that acts as a bump, you lose braking force for a split second and your three year old happens to be right in front of you...the split second you lost due to the regenerative braking could be the split second that could've saved your son/daughter. I know I am being fatalistic, but I am not necessarily exaggerating. Honestly, better safe than sorry, right? Hasn't Doug Coleman said anything about this?

[richard schumacher]

The "problem" is an illusion: it *feels* like the car is accelerating forward, but what's happening is that hard braking is being interrupted when the car loses traction, and that sudden loss of deceleration feels like acceleration. One cure is to give yourself more distance for braking.

[jburns]

Originally Posted by darkleafar

God forbid, but imagine you are driving into your garage, there is something in the way that acts as a bump, you lose braking force for a split second and your three year old happens to be right in front of you...the split second you lost due to the regenerative braking could be the split second that could've saved your son/daughter.

If you are coming into your garage fast enough for your front tires to come off the ground you are about to go straight through the back wall anyway.

[qbee42]

I don't believe for a second that the car "decided to give gas to one or both of the wheels". This doesn't make any sense at all. I assume that one or both of the front wheels lost traction and the braking system switched to friction brakes. That action is well documented, and is not a safety issue unless you overdrive the conditions. The sensation of acceleration is an illusion. The car is still slowing down, but for a brief instant the rate of deceleration drops to near zero. This feels like acceleration, but it's not.

Tom

[fredthepostman]

Originally Posted by qbee42

I don't believe for a second that the car "decided to give gas to one or both of the wheels". This doesn't make any sense at all. I assume that one or both of the front wheels lost traction and the braking system switched to friction brakes. That action is well documented, and is not a safety issue unless you overdrive the conditions. The sensation of acceleration is an illusion. The car is still slowing down, but for a brief instant the rate of deceleration drops to near zero. This feels like acceleration, but it's not.

Tom

Perception is reality.