WEBVTT - Could anti-lock brakes detect a flat?

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<v Speaker 1>Welcome to brain Stuff from how Stuff works dot com.

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<v Speaker 1>We're Smart Happens brought to you by Pisa. We all

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<v Speaker 1>Brain with today's question. Could an anti lock braking system

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<v Speaker 1>detect a flat tire in a car? And anti lock

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<v Speaker 1>braking system is a system that helps the driver to

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<v Speaker 1>avoid skids during panic stops. In a car with normal brakes,

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<v Speaker 1>all four wheels will lock and cause the card to

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<v Speaker 1>skid if the driver jams on the brakes in a

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<v Speaker 1>panic situation, the problems with skidding our first, the car

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<v Speaker 1>will actually take longer to stop. In second, the driver

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<v Speaker 1>loses all control of the vehicle, and the anti lock

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<v Speaker 1>braking system lets a computer monitor of the wheels. If

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<v Speaker 1>one of the wheels locks, the computer compulsed the brake

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<v Speaker 1>on that wheel, so the wheel keep spinning a little bit.

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<v Speaker 1>Because the wheels continue to spin, the driver can continue

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<v Speaker 1>to control the car with the steering wheel. The computer

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<v Speaker 1>census rotation using a rotation sensor on each wheel. If

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<v Speaker 1>the computer were programmed correctly, and if there were a

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<v Speaker 1>light on the dashboard, then the computer could detect a

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<v Speaker 1>flat tire and warn you about it. What the computer

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<v Speaker 1>could do is look at different rotational speeds For one

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<v Speaker 1>out of the four wheels, a flat tire would spin

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<v Speaker 1>faster than a properly inflated tire, So the computer would

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<v Speaker 1>look for one tire spinning faster than the other three

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<v Speaker 1>on average over the course of a period of time

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<v Speaker 1>that it could warn the driver by activating the light

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<v Speaker 1>on the dashboard. There are several production cars that use

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<v Speaker 1>this technique, starting with two thousand six models. The National

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<v Speaker 1>Highway Transportation Safety Administration requires that all cars have some

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<v Speaker 1>kind of tire US You're monitoring system. Do you have

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<v Speaker 1>any ideas or suggestions for this podcast? If so, please

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<v Speaker 1>send me an email at podcast at how stuff works

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<v Speaker 1>dot com. For more on this and thousands of other topics,

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<v Speaker 1>go to how stuff works dot com.