![]() ![]() If you can't make the caliper back out electrically, it is usually possible to wind it back with an inexpensive brake caliper tool. That information can of course be found in your Haynes manual. One of the reasons for automakers moving to electric parking brakes is the automation it allows - an electric parking brake can be programed to activate automatically when the transmission is placed into park.Įlectric parking brakes do add a complication though when you are doing a brake job - you need to know the secret trick to make the computer unscrew the brake piston. Instead of hydraulic pressure clamping the rear disc, or a cable pulling a lever arm which turns a screw ramp, an electric motor turns a threaded piston in the caliper, clamping the disc. In the past few years, as rear disc brakes became commonplace, electronic parking brakes have proliferated. The parking brake, aka emergency brake, aka handbrake, aka e-brake, was until recently still very much like early mechanical brakes, with a cable connected to a pedal or a hand lever. In the late 1960s the United States Department of Transportation mandated that hydraulic systems would have a redundancy for safety, which they still do. This system was better in that it was easier to engineer, and easier to keep in proper adjustment, but it could fail suddenly if one of the hydraulic components started to leak. ![]() Sometime before WWII, most cars had moved to a hydraulic brake system, or as the old timers call them "juice brakes". We admit having the car to breakdown on you is a major inconvenience but knowing that the braking system on your car has malfunctioned, not being able to drive the car is actually a failsafe to prevent the risk of an accident.Īlthough mechanical handbrakes, whether is it hand or foot-operated, have their benefits, the convenience and functions brought about by EPB far outweigh the ability to initiate handbrake turns.In the dawn of the automotive age, all brakes were mechanical, using either a cable or system of rods to force a friction surface to rub on a metal surface connected to the wheels. A problem that you won’t have with manual parking brakes. At times this would cause your car to not be able to move and require a tow truck. Whenever any of these systems malfunctions, the EPB would not be able to function, and warning messages would light up your instrument cluster. This is also the reason why the previous-generation Honda Accord’s Honda Sensing does not have Low-Speed Follow function. Besides that, EPB is part of the car's wider network of electrical systems which is connected to the ABS, Brake Assist, and ESC.ĮPB at times is a hardware requirement for certain functions on Advanced Driving Assistance Systems (ADAS). Having EPB also allows car manufacturers to free up precious cabin space as compared to manual parking brakes. Auto Brake Hold is especially convenient when crawling in stop-go traffic. Most EPBs come bundled with the ‘Auto Brake Hold’ function which automatically engages the brakes when the car is at a stop. Simply press to engage or disengage the parking brake. Manual parking brakes are also cheaper to repair/maintain as it only involves mechanical hardware.ĮPB also functions similarly to the hand and footbrake, however, the difference is that the EPB is operated via a switch. Besides preventing the car from rolling away, it also doubles up as emergency brakes in the event where the hydraulic braking system fails. It bypasses the brake servo pump and has a direct connection to the rear brakes. The manual handbrake and footbrake work exactly the same by locking the rear brake disc (or brake shoe for cars with brake drums) when applied. (function() ) įirst, we will explain how each parking brake works. ![]()
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