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Enthusiasts Here's How Electronic Parking Brakes Work

19:58  09 august  2018
19:58  09 august  2018 Source:   jalopnik.com

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Quickly fading are the days when we were free to dream of cranking a lever connected to cables that would squeeze the brakes and break traction, as more and more modern cars replace cabled emergency But there’s a lot of good reasons for it, so here ’ s how electronic parking brakes work .

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  Here's How Electronic Parking Brakes Work

Quickly fading are the days when we were free to dream of cranking a lever connected to cables that would squeeze the brakes and break traction, as more and more modern cars replace cabled emergency and parking brake systems with simply a button. But there’s a lot of good reasons for it, so here’s how electronic parking brakes work.

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Back in the early 2000s BMW was in a revolutionary phase of car design, and with the introduction of the all-new E65 7 Series, it also introduced its internet-age interior including the first electronic parking brake system, where the function was now activated by a little button to the left of the steering wheel.

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To many people, electronic parking brake (EBP) is a new feature in their car, therefore knowing how the system works can go a long way when conducting a system repair. An electronic parking brake replaces this mechanism with an electronic one.

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Where before most cars activated their parking brakes either by a lever next to the driver’s seat or by pressing down on a little locking pedal in the driver’s footwell, which were both connected mechanically by cables leading to the rear brakes, a new age of production cars had been introduced utilizing the convenience of electronics.

The user-end of most electronic braking systems is fairly straightforward and uniform, where the driver can activate the parking brake with the push of a button, but the business end where the actual friction happens can take a few different forms.

The first of the two most common electronic parking brake (EPB) systems still involves mechanical cables, but instead of having the cables run up the length of the car to be tugged on by the driver, the cable from each brake caliper leads to a remote motor.

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Quickly fading are the days when we were free to dream of cranking a lever connected to cables that would squeeze the brakes and break traction, as more and more modern cars replace cabled emergency and parking brake But there’s a lot of good reasons for it, so here ’ s how electronic …

Ever wonder about how your vehicle' s parking brake works and what it looks like when it' s taken How Car Brake Works - Продолжительность: 2:29 Automotive Basics 840 616 просмотров. Electronic Parking Brake Manual Release - Продолжительность: 3:14 Garage Gurus 35 883

The motor is either controlled by its own electronic control unit, or by the car’s control unit. When the EPB button is pushed, the signal is sent to the motor to pull on the cable, which squeezes the brake pads down onto the disk and the holds the car in place.

For the E65 BMW 7 Series, the motor was conveniently located under the floor of the trunk, making it easily accessible for repairs. That’s a good thing, as this video from AutoTech USA demonstrates, because of the plastic motor gears that tend to break and require replacement. The video also gives you a good idea of how the cable puller system works:

As is pointed out by Auto Service Professional in their parking brake breakdown article, this system has the advantage of using parts, like the caliper, that are consistent with traditional mechanical parking brake systems that already use cables. That advantage makes a cable-puller EPB system an easy add-on to anything that does not already have the system.

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A description of how parking brakes work aka emergency brakes . Electro -Mechanical Parking Brakes (EPB): How to do rear brakes - Продолжительность: 8:33 RossTechVCDS 154 474 просмотра.

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The second most common type of EPB system dumps mechanical cables entirely. The caliper-integrated braking system uses two little motors attached to each rear brake caliper, with each motor pushing the caliper piston which squeezes the pads to the disk. The animation below shows how the piston operates:

As Auto Service Professional also points out, this drastically reduces the amount of real estate the parking brake system takes up, since you don’t have cables leading away from the caliper to a motor box. The caliper-integrated motors also streamline the design and make it easier to integrate with other computer-controlled vehicle systems.

In the press release for the E65 7 Series, BMW sang the electronic parking brake’s praises as both a convenience and a safety feature. The electronic parking brake allowed for activation anytime the car came to a standstill, which caused less worry when stopped on a hill or in creeping traffic, and if held down, it also acted as a stabilizing emergency brake.

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This is a short video on how the Honda Electric parking brake works . Currently available on the 2017 CR-V, 2016-2017 Civic, 2016-2017 HR-V (made with

Put simply, an electronic parking brake replaces this mechanical system with an electrical one. By pressing the switch, motors on each brake caliper To release the electronic parking brake , simply attempt to drive off and it will automatically disengage – usually! Sometimes when you first start the

Another added advantage was protecting the vehicle “from unauthorized use,” as the brakes would be locked when the engine was switched off and only unlocked with the return of the electronic key. Other advantages of current-day electronic parking brake systems involve coordination with traction control systems and parking assist systems.

Beyond convenience and safety, electronic parking brake systems also improved interior packaging for designers. As the man behind Koenigsegg once explained to Jalopnik, not having to carve out space for a parking brake pedal or lever, as well as the cable linkage which would also need to be insulated, adds flexibility to the interior design.

The drawbacks to electronic parking brakes are the potential for slightly more complex and costly maintenance and repairs in some cases, and of course the loss of the ability to Tokyo Drift your long wheelbase German limousine.

But for the vast majority of drivers, the advancement in safety and convenience with what is essentially an idiot proof system is worth the loss of a direct connection with their parking brake.

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