How "brake override" stops runaway cars

[vince33x]

So-called "Sudden" or "unintended" acceleration is not a mechanical or electrical problem, it is a "legal" problem. It is the product of poor drivers combined with the trial lawyers. Above all, it is the latest in shakedown schemes.

[CCAAASSSCCAAAA]

Heel and toe eh?

YEAH RIGHT!

I have a size 12 1/2 foot that is wide too and I can still heel and tow better than this guy. The way he performed this looks way more unsafe.

Anyway, this is why I drive older cars. None of the electronic nanny devices can get into my way strictly cause they aren't there =D

[bam6972]

wow stupid. no more burnouts WTF

[tuolumne9]

welcome to vw/bmw/mb circa 1999. Toyota = :/

[kostis007]

thats why i have manual gearbox...

[DavidKneiber]

you guys just abuse every single car you get huh? like that other video with the toyota's bouncing off the rev limiter? hahha

[nooniensoong1]

interesting i wasnt aware that it lost vacuum assist so quickly. 

[obejopr]

hear him at min 3:55 what gas and throttle at the same time?

[Membrane556]

Why not just ban push button starters that require 3 seconds for shutdown and mandate a key or switch that can shut down the engine in half a second?

[JOHNM3791]

Pretty much The Device that Shuts Down your Cruise Control when you Hit the Brakes, Old technolgy used in a Slightly Different Way ! My 82 Mustang had This. Only this Shutts Down throttle regardless if the Cruise Control is Activated or Not.

[arena2101]

Great report. Anyone who is still blaming the drivers for not hitting the brakes when their toyota decides to run wild needs to watch to this.

[naruto5538]

was that GTi a shift? is that why there were three pedals? clutch, brake, gas?

[circusboy90210]

as amazing as the technology seems I would have to disable this for reason the human needs the ultimate decision in certain cases this can be safer. if not most.

[tofum]

Nissan's been doing this for many years..........Good advertising for Toyota there CR. A little misleading....

[madtownmadman]

I'm assuming that power-assist is lost, because the WOT prevents any vacuum needed to operate the brake booster. What does anyone else have to say? The need for a "technology" as this, seems rather stupid. This is all because of those drive-by-wire throttle controls. Nothing has a trusty mechanical linkage anymore. One more thing to fuck up on a car, and cause the check engine light to come on.

[Membrane556]

@madtownmadman

Also blame push button starters some of which take 3 seconds which is 3 seconds too long turn off the engine.

[samjezard]

why can't i just have a mechanically linked accelerator, gas, and steering controls? with all these electronic gizmos comes more crap to go wrong, more inherent costs, and more weight...even the air force still uses mechanical linkages as their emergency systems

[denisRBlais]

What is wrong with just turning the IGNITION OFF ?

Having learned to drive where there is snow on the ground 8 month of the Year !!!!

We had to learn a few tricks when the Gas pedal got stuck in melted snow and it would freeze again over night

[SABAM25177]

I would honestly love to know how weak this guy is. I would hate to see him deal without power assisted brakes on a regular basis.

[motormusique]

I'm surprised it took so long to stop that Avalon the first time. Car and Driver did it with a Camry V6 in much shorter distances with the gas pedal floored.

[dalaipapa2]

One of the reasons I drive a '96 with a stick...

[Deej1188]

I think watching this guy beat on all these different mildly expensive cars pained me the most...

[chrlmack]

The first action one needs to do in this situation is, move the gear selector from D (drive) to N (Neutral) while applying the brake normally or as necessary. Putting the car in neutral will separate the engine from the drive train and remove the driving force. Where ever the car stops; turn the engine off; make yourself safe; call a tow truck and tow it to the shop.

[chrlmack]

The first action one needs to do in this situation is, move the gear selector from D (drive) to N (Neutral) while applying the brake normally or as necessary. Putting the car in neutral will separate the engine from the drive train and remove the driving force. Where ever the car stops; turn the engine off; make you self safe; call a tow truck and tow it to the shop.

[lcrossgirl93]

Solution to Toyota/ Lexus recalls: The Decelerator

[barrymotex]

rescueswitch is on ebay and inexpensively cuts off the engine

[osmand23]

ill use handbrakes

[subarulz]

Thank you GM/Ford for sponsoring this video. Way to stir the pot to take advantage of the situation. Hope it helps you sell a few more cars.

[trunksy]

Did Consumer Reports release what manufacturers don't have this tech? Obviously, Toyota going forward and the specific German cars mentioned in the video but what about American cars and Honda? I currently drive a Honda but a Toyota or a German car might be my next car if that's the case. Toyota should use this fact if the other manufacturers don't jump on this like Consumer Reports suggests.

[POWEREDBYDEESNUTS]

You might want to press the gas and the throttle at the same time. The same thing LOL

[kaunasprince]

What the hell will this do for my 2007 Prius? I don't have a brake override.

[mlamike]

Prius has always had brake over ride. Everyone ever made has this technology. The Prius never had an unintended acceleration problem. They are made in Japan and do not use the recalled CTS pedal.

[1g2002541]

lol,the foot lifting power lose

Is it true for non-ABS equipped cars?

[jumadepe]

thanks really good video!!!

[plagick]

This is awesome an Consumer reports republican is a race car driver. There is tooo a reason to power break and do burn outs dude. lighten up.

[scaremenga]

How fitting that Consumer Reports decides to do the test in a Toyota Avalon. Don't have anything against Toyota either, just stating the irony.

[rickhamilton620]

Because the Avalon is one of the affected cars that will be getting the brake override protection, it makes sense from a context perspective

[BMWBurnoutM3]

Why is it that you lose power brakes if you let off the pedal in a car without brake override?

[CensoredVA]

The power brakes are assisted by the vacuum pressure created by the engine. If the throttle is wide open, there isn't any vacuum pressure so the engine isn't helping to apply the hydraulic pressure on the brakes.

That said, I've driven several cars without any vacuum assist (as in, no power brakes) and have never had an issue stopping them, even to full lock.

[blurglide]

Wow- By your name I would've though you were an enthusiast. It's because power brakes are generally powered by manifold vacuum. When you're at full throttle, the intake manifold is at ambient pressure, so there is no more vacuum to assist you. With a throttle override, the motor will momentarily go to idle while you're pumping, quickly reestablishing the vacuum.

Turbo cars, like my 335i, often have a manifold at or above atmospheric pressure, so have a vacuum pump. You ALWAYS vacuum then.

[blurglide]

i don't see my post.  Brakes are powered by intake manifold vacuum. At full throttle, the manifold is at ambient pressure, so you have no vacuum. With a brake override, the throttle goes down to idle and vacuum is quickly reestablished.

If you have a turbo car, like my 335i, the manifold is often at or above ambient pressure. Vacuum based accessories are powered by a vacuum pump in these cars, so there's never any worry of losing power assist.

[rickhamilton620]

You lose power brakes in any car due to the power assist being vacuum operated. When the engine is at WOT, the assist given to the brakes is lessened, esp. if one choose to pump the brakes in a panic SUA situation.

The reason why the car with brake override didn't lose as much assist is because the car didn't increase in speed as much (if at all)

[kaunasprince]

In my KIA Optima,I always brake gently before coming to a full stop.This involves some time taking my foot off the brake.I do have ABS,and it does not affect my ability to stop in the least.The same in my Prius.I think the Prius brakes are electric,aren't they?

[sjbartnik]

@BMWBurnoutM3 Great question and I hadn't really thought of it before, but: the power assist for brakes is vacuum-operated. However, when the engine is at wide-open throttle, it doesn't produce any manifold vacuum. There's enough vacuum reserve for one good application of brakes but if you pump the brakes you have exhausted the vacuum and since the throttle is wide open, you don't get any more vacuum for the power brake assist.

[mikeye9]

Excellent video.