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[LAT] Runaway Prius hits 90 mph before stopping with aid of CHP - Page 28

post #271 of 400
Quote:
Originally Posted by AzO View Post
The OP isn't about electronic malfunction, it was about the throttle "sticking" or getting "stuck". Besides, don't you think the news report was poorly put together just to get more dirt on Toyota? They must think the American people are really stupid if we're going to believe a single word they say.

Stock or not every car is tested to stop from 62-0 mph, 70-0 mph and 100-0 mph. How strong your brakes (# of pistons) has nothing to do with how well your car brakes, it's how much traction your tires can put on the road. It's not hard to search Car and Driver and other car magazines for Prius brake distances.
First, a throttle "sticking" can mean many things, especially in modern cars where the throttle is controlled by a computer, and you give input to that computer via the pedal. In other words, the gas pedal isn't directly connected to the throttle at the engine anymore. Everyone is saying "stuck throttle", but it has yet to be determined whether the problem lies within the pedal itself or a computer malfunction.

Secondly, those braking tests aren't done under full throttle. Makes a HUGE difference in how well you can stop a car. A vehicles stock brakes aren't going to overheat in a single 100-0 stop, but they likely will if you have the throttle going full bore at the same time.

I wouldn't put it past someone to purposely stage something like this if they have something against Toyota, but it's far from proven to be such a stunt, in the way you portray it.

Quote:
Originally Posted by Col. Newman View Post
Wow people learn to recognize sarcasm, maybe read a few posts up before reply too. Beside I have already sated that I doubt the brakes would stop the car, which is why I didn't even mention it in my first post I said SHIFT THE CAR TO NEUTRAL
Shifting the car to neutral might not be possible if the stuck throttle was a computer-related issue, since the computer also controls the transmission without a direct mechanical link. Same with turning the car off.

We've all had a similar issue at one time or another on our computers - the computer locks up, and is stuck in a half-second sound loop. What if the Prius computer locked up, and is stuck in an acceleration loop? Nothing else would respond, including attempting to power it off via holding down the power button, or putting the car in neutral, or brakes (to some extent). The person would be at the mercy of the car. IMO, it's either a situation like this that is happening, or people are just too stupid to figure out how to stop the car. Or they're doing publicity stunts. But don't rule out the fact that it very well COULD be an issue with the car itself, where even an experienced and knowledgeable driver could have trouble.
post #272 of 400
1. Push in clutch
2. Shift up
3. Release clutch
4. ?????
5. Profit!
post #273 of 400
Sgtspike, very interesting theory. I believe most people don't understand that there is inf act no longer a direct mechanical link.
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Lal
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post #274 of 400
Quote:
Originally Posted by makecoldplayhistory View Post
Try pulling a gear stick into neutral when the engine's driving the wheels. If you're costing to a stop, no problem: if the engine's putting power to the drive wheels, it's a tough job.
Automatics don't tend to lock into gear like manuals do. They will very easily come out of gear when the power is applied. Being 'in gear' for an automatic is a simple matter of a hydraulic circut activating a few clutches and bands, if you vent that hydraulic pressure away from the solenoids it goes into 'neutral'.

As long as there's a cable attaching the shifter to the valve body, an automatic will go into neutral with power on.

Quote:
Originally Posted by Col. Newman View Post
hmm yeah and while were uselessly speculating let just a assume the brakes don't work either in that case lets just give up and find a nice pole to run into how bout that?
Or you could shut the negine off? Put it in neutral?

Quote:
Originally Posted by urgrandpasdog View Post
IIRC, with both the gas and electric engines going, the Prius' regular brakes are not powerful enough to stop the vehicle.
That's my thought. The gasoline engine may be woefully weak, but the electric motor in the Prius probably has more torque than my truck has. And as many have said, the hydraulic brakes on the Prius are absolutely pathetic, more or less a formality.

Quote:
Originally Posted by AzO View Post
\\
My is the whole incident was engineered by "someone" or some "organization" intentionally wanting to hurt Toyota and their brand image.
So there's no way for Toyota to make an ECU with a glitch in the programming?

Man, I'd love to live in your world. Windows must work perfectly, too. And the government is efficient.

Dude, cars break. The more complex cars get, the more they break and the more dangerous those failures are. There was a day when this would never happen because the engine was controlled by a cable. And people knew how to drive, so even if it did run away(Cables do fail after 20 years, after all), the driver would easily be able to regain control and repair the car.


Quote:
Another point, the driver was still driving for another 20 full minutes! with a stuck accelerator pedal! Let's see here, if my pedal was stuck for 20mins I'd either be dead or would've rear ended another car OR I'd be calling the police and the media to get coverage of the whole "incident".

So it's physically impossible for someone to manage to weave in and out of traffic at 94MPH without hitting anything, right? Nevermind people do it every weekend in the US at 194MPH, people do it every morning going to work in every big city in this nation, and cops are trained specifically to do just that.

Brilliant. Yes, the guy was an idiot, but that doesn't mean he's guaranteed to crash. Some people are just lucky.


Quote:
The OP isn't about electronic malfunction, it was about the throttle "sticking" or getting "stuck". Besides, don't you think the news report was poorly put together just to get more dirt on Toyota? They must think the American people are really stupid if we're going to believe a single word they say.
The issue is a runaway engine. This can be caused by a software error, a physically jammed pedal, hell even a vacuum leak could cause it. It's alraedy been ruled out that it's not a physically stuck pedal and it's not a vacuum leak, so it must be a software error. And don't tell me software is infallible...you own a PC, you know better than that.

Don't be an idiot.



Quote:
Stock or not every car is tested to stop from 62-0 mph, 70-0 mph and 100-0 mph. How strong your brakes (# of pistons) has nothing to do with how well your car brakes, it's how much traction your tires can put on the road. It's not hard to search Car and Driver and other car magazines for Prius brake distances.
The Prius' hydraulic brakes are there solely for a formality. They're utterly useless. They're woefully undersized and have no real force to them. Plus, the electric motor makes a buttload of torque, and that same electric motor is normally turned into a generator to do most of your braking. It makes sense, if you actually think about it, that if a software error causes the car to go balls-to-the-wall insane, the electric motor responsible for 75% of the Prius' braking ability is suddenly pulling the car down the road as hard as it can. If it's doing that, it can't brake. You have absolutely 0 regenerative braking if the electric motor is actually powering the car.

Quote:
Originally Posted by bomfunk View Post
1. Push in clutch
2. Shift up
3. Release clutch
4. ?????
5. Profit!
1. Push in clutch.
2. Key to "off". NOT LOCK, DUMMIES!
3. Coast to shoulder.
4. ???
5. PROFIT!
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post #275 of 400
Quote:
Originally Posted by TestECull View Post
2. Key to "off". NOT LOCK, DUMMIES!
So, what would happen?
post #276 of 400
Quote:
Originally Posted by TestECull View Post
1. Push in clutch.
2. Key to "off". NOT LOCK, DUMMIES!
3. Coast to shoulder.
4. ???
5. PROFIT!
This. Why shift into neutral when you can just turn the car off? With all of these "Stuck Throttle" stories on the news all of them were like "I Tried the breaks and it didn't work" then they say "I tied shifting gears and that didn't work" then they call 911 and ask for help. But Hello? Turn off the card?
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post #277 of 400
Actually I was thinking, and I don't think this has been addressed; does the Prius lock the steering when you push and hold the button to kill the motor? Wouldn't be a good idea to cut the power if that was the case. Plus, as has been said, if this truly is a computer problem, who says the car will even turn off?
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post #278 of 400
Quote:
Originally Posted by bomfunk View Post
So, what would happen?
Engine shuts off. You retain ability to steer car, altho without any power assist.

Quote:
Originally Posted by ljason8eg View Post
Actually I was thinking, and I don't think this has been addressed; does the Prius lock the steering when you push and hold the button to kill the motor? Wouldn't be a good idea to cut the power if that was the case. Plus, as has been said, if this truly is a computer problem, who says the car will even turn off?

Don't think so. The guy in the article shut the engine off at 50MPH and didn't say anything about the wheel locking on him.
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post #279 of 400
Quote:
Originally Posted by TestECull View Post
Or you could shut the negine off? Put it in neutral?
it was sarcasm in response to speculation that the car wouldn't shift to neutral.
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post #280 of 400
Quote:
Originally Posted by TestECull View Post
That's my thought. The gasoline engine may be woefully weak, but the electric motor in the Prius probably has more torque than my truck has. And as many have said, the hydraulic brakes on the Prius are absolutely pathetic, more or less a formality.
Exactly, most of the braking comes from using the wheels to turn the motor (using it as a generator, thus "regenerative braking." But with the accelerator down, the motor is driving the wheels, rather than the other way around. So now not only do the regular brakes not have the assistance that they usually do, they are fighting against 2 engines/motors rather than 1.
    
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