acceleration over uneven road surface while braking

If i had hair i'd get it cut.
You should try getting a life.

 

Thank you for reading my non-response response. I'm assuming you are now allowing me to response? (You didn't specify "please do not response" this time. Thanks.)

It's still NOT ACCELERATION no matter how big and caps you spell the word, as the car does not move forward at a faster pace. It only slows down at a lesser pace.

It's still not a slingshot. You need a circular motion and sudden release to constitute a "slingshot" action. Please see the above videos another member posted for further explanations.

If you're really serious about the problem, talk to Toyota. Trolling here using "unscientific rumours" here doesn't solve your problem. Or you can just sell it for $1000 as another member suggested.

 

So again, how much faster are you traveling after steady brake pedal application than before brake pedal application?

 

Well, I believe there is no future for this "gentleman" in this forum.
We cannot help him, because he doesn't want to be helped. I see no way he can help us, besides giving us a good warning about how dangerous is to drive a Prius, disengaging motors and having design flaws. Sorry but the post about description is not accurate.
Perhaps banning is more useful to both parties? Correct me if I am wrong.

 

Double post, double troll

 

Good Morning Laird,

I've experienced this phenomena once, while braking through an intersection that was being repaved. As I hit the rougher dropoff area, the car felt like is was on ice for a split second (got a nice little adrenaline rush) before it returned to its normal braking. I could see why people felt like the car was accelerating, but in reality the car's rate of deceleration was what changed. In effect it did "accelerate" because the rate of deceleration decreased. BUT the overall rate of speed was decreasing over time, even when the car was going through the event.

This phenomena has been discussed on these forums before, and using the search function should help you find out more information on it. You are not alone in this observation, and yes, it is "unnerving" when it happens.

Please realize, when you come in with a low post count, a provocative titled thread, and what appears to be an unreasonable complaint not supported by any background story, people here will be rubbed the wrong way. Some are forgiving and will try to get more information from you, give suggestions to help your situation or support. Others might want to define some terms so that we are all talking about the same thing using the same definitions.

Bob Wilson is a very helpful person and does collect scientific data, perhaps moreso than anyone else here on the forums. As a scientist myself, I really do appreciate his approaches. As I'm not an engineer, I have a dandy time trying to make heads or tails out of his charts, but there are many engineers here that can do that (and they translate it for the rest of us).

If Bob is offering to help, please take him up on it, otherwise you will be viewed as just coming to the boards to vent and troll up ill behavior rather than to try to find answers to your problems.

 

Maybe the software update was not applied correctly.
I would have a dealer check that first and re-apply the update if necessary.

 

Now, please post that data so that we may review it.

Extraordinary claims demand extraordinary evidence.

 

Ok, I'm responding to my own original response, just in case the op is really serious about the problem and missed my response.

He had posted that it occurs after one of the wheels hit a pot-hole. I wonder if it's similar to my experience that the front-end of his car was momentarily air-born so that even if the brakes stopped the wheels from spinning, he still felt his car "lurching" forward for a split second.

This has nothing to do with the Prius' electronic regen and mechanical braking gap problem. This will happen to all the cars no matter what kind of brakes they have. So no matter how many times he send his Prius to the dealer to get the "fix", it won't fix it, 'cause it's not that problem.

One solution is to avoid the pot-hole. I'd imagine if he repeatedly hit the same pot-hole so many times he'd gotten so familiar with it that he should be able to anticipate far ahead to avoid it? Or he can slow down the car before going into the pot-hole so it won't bounce air-born after the huge impact. It's good for the car's ride too!

 

i would say a moderator is needed in this situation. just doesn't seem right, and i've been on car forums for years with other vehicles.

 

He posted in the newbie forum, for what reason? to get help from newbies? or to scare them?

He got scolded there and repeated the same post here, and in spite of so many members offering sincere help, all he did was lip service thanks but did not produce any proofs as requested. For what reason?

 

Regarding the humbleness of our recent newbie, perhaps the moderator should speak/write very polite English.
Starting with "Mr.Sikes, aka Mr.Banks, ..."

 

He's calling desperately for ABS!
(Acronym for Asap Banning Switch )

 

The wheel doesn't need to be airborne for the ABS to actuate. The rebound from a pothole will momentarily cause the wheel to have less force pressing it to the pavement, therefore less traction and will result in ABS actuation if the brakes are applied sufficintly.

As has been mentioned before, a sudden change in acceleration can feel like acceleration in the opposite direction, even though it isn't.

You said you had data, please share it.