Unintended Acceleration: A note on what to do from some experts..

Fumesucker

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Tue Mar-09-10 09:50 AM
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Unintended Acceleration: A note on what to do from some experts..

Car and Driver is one of the top car enthusiast magazines in America today, they investigated and performed actual experiments and then addressed what to do if your car accelerates when you don't want it to do so.

If you have any doubts whatsoever that you don't know what to do if your car suddenly accelerates against your wishes I strongly urge you to read the entire article at the link, doing so might just save your life.

http://www.caranddriver.com/features/09q4/how_to_deal_with_unintended_acceleration-tech_dept

Our focus here is not to question the validity of the “floor-mat” claims (some investigators have suggested that a faulty drive-by-wire system is to blame) but to present methods for coping with this heart-stopping situation and to investigate a Toyota’s relative performance during such an event. For our tests, we rounded up a disparate bunch: a V-6 Camry (a recalled vehicle), an Infiniti G37 convertible, and a hugely powerful 540-hp Roush Stage 3 Mustang.

Our tests were conducted at highway speeds, as the incident with the Lexus ES350 happened on an expressway, and in the lowest possible gear, as that's the worst-case scenario. Here is how to deal with a runaway car:

Hit the Brakes

Certainly the most natural reaction to a stuck-throttle emergency is to stomp on the brake pedal, possibly with both feet. And despite dramatic horsepower increases since C/D’s 1987 unintended-acceleration test of an Audi 5000, brakes by and large can still overpower and rein in an engine roaring under full throttle. With the Camry’s throttle pinned while going 70 mph, the brakes easily overcame all 268 horsepower straining against them and stopped the car in 190 feet—that’s a foot shorter than the performance of a Ford Taurus without any gas-pedal problems and just 16 feet longer than with the Camry’s throttle closed. From 100 mph, the stopping-distance differential was 88 feet—noticeable to be sure, but the car still slowed enthusiastically enough to impart a feeling of confidence. We also tried one go-for-broke run at 120 mph, and, even then, the car quickly decelerated to about 10 mph before the brakes got excessively hot and the car refused to decelerate any further. So even in the most extreme case, it should be possible to get a car’s speed down to a point where a resulting accident should be a low-speed and relatively minor event.

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We included the powerful Roush Mustang to test—in the extreme—the theory that “brakes are stronger than the engine.” From 70 mph, the Roush’s brakes were still resolutely king even though a pinned throttle added 80 feet to its stopping distance. However, from 100 mph, it wasn’t clear from behind the wheel that the Mustang was going to stop. But after 903 feet—almost three times longer than normal—the 540-hp supercharged Roush finally did succumb, chugging to a stop in a puff of brake smoke.