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The BRAKE Report
Home » Automotive » Brake-by-Wire Consumer Primer
Automotive

Brake-by-Wire Consumer Primer

The Brake ReportBy The Brake ReportOctober 5, 2020No Comments2 Mins Read
GM will soon begin notifying owners of the C8 Corvette and other models about an electronic brake boost recall
GM will soon begin notifying owners of the C8 Corvette and other models about an electronic brake boost recall
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Source: Road & Track post

Brake-by-wire systems are becoming increasingly common for a variety of reasons. These systems are particularly useful in hybrids and EVs, where they allow the brake pedal to control both regenerative and friction braking, but even non-electrified cars—like the new C8 Corvette Stingray—use brake-by-wire, too. So, how do these systems work, and what happens if they fail?

As reliably as the sun rises and and sets, YouTuber Jason Fenske of Engineering Explained, is here to make sense of brake-by-wire. Fenske focuses on the system in the new Audi e-Tron Sportback, but he told Road & Track that all brake-by-wire systems are broadly similar.

Essentially, a brake-by-wire system controls the brakes electronically. A position sensor monitors how far the driver has pushed the brake pedal, which is used to determine the amount of braking force requested. A control then unit determines how much hydraulic pressure is required, and an electric pump is used to actually generate that pressure and stop the car. All of which happens in an instant. In some electric cars, like the e-Tron and Porsche Taycan, the brake hydraulics are only activated after a certain threshold is met—light pressure on the pedal may only trigger electric motor regeneration.

Related post:
Brake-by-Wire Offers Numerous Benefits

These systems allow brake pedal feel to be tailored to certain drive modes. Or as with the new Acura NSX, as brake temperature increases—when temperature increases, the pedal goes long, as it would with a conventional hydraulic system. Neat stuff, though you might be wondering what happens if any of the electronics fail. As Fenske explains, these systems maintain a physical connection between the pedal and the brakes themselves. If something goes wrong, a valve opens up that bypasses all the electronics, leaving you with a conventional hydraulic system.

So, there’s no need to be afraid of brake-by-wire. And oftentimes, it’s hard to tell the difference between a conventional hydraulic setup and brake-by-wire. For more, be sure to watch Fenske’s video.

This content is imported from YouTube. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

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The BRAKE Report is an online media platform dedicated to the automotive and commercial vehicle brake segments. Our mission is to provide the global brake community with the latest news & headlines from around the industry.

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