How Does the Hydraulic Brake System in a car Work

Posted in Brake & Suspension | Asked on Mar 26, 2010

as part of some science work i have to explain how a hydraulic brake system works

There are 5 Answers for "How Does the Hydraulic Brake System in a car Work"

  1. Sophie B says:

    You push the pedal..
    the pedal pushes the piston inside the master cylinder..
    this pushes brake fluid out to the wheel cylinders..

    The wheel cylinders push the pads against the discs..

    Stopping the car…

  2. MICHAEL S says:

    easyest way to discribe how it woks is..its like a bike hand pump with 4 pipes going to each wheel..the pump handle is the foot brake,just replace the air in the pump with brake fluid,at the end of each pipe theres a smaller hand pump…when you push the big hand pump all other little pumps are forced open[these will be the brake calipers/cylnders...thats about that really...then youve got the brake servo,it uses a vacume from the engine[or a vac pump] to assist in the braking effort….hope this helps

  3. geral_elbambino says:

    When the brake pedal is pressed, leverage multiplies the force applied from the pedal to a vacuum booster. The booster multiplies the force again and acts upon a piston in the master cylinder.

    As force is applied to this piston, pressure in the hydraulic system increases, forcing fluid through the lines to the slave cylinders.

    The two most common arrangements of slave cylinders are a pair of opposed pistons which are forced apart by the fluid pressure (drum brake), and a single piston which is forced out of its housing (disc brake).

    The slave cylinder pistons then apply force to the brake linings (generally referred to as shoes for drum brakes and pads for disc brakes). The force applied to the linings cause them to be pushed against the drums and rotors. The friction between the linings and drum/rotor causes a braking torque to be generated, slowing the vehicle.

  4. ruskinflgator says:

    So what’s your point? Are you supposed to research this subject?
    The real answer is that it uses the laws concerning hydraulics, and its up to you to figure them out.
    The brake booster in most vehicles uses vacuum over hydraulic to boost the pressure in the system to reduce the amount of effort required to operate the calipers and /or wheel cylinders, which in turn either press pads onto the rotating disc to stop vehicle, or press shoes out against the rotating drum to stop it. Federal law requires the system to be split up into 2 halves so that in the event of a fluid leak there is a better chance that there will still be SOME braking .
    There are a lot of variables in the systems used-try someplace like”Howitworks.com” for more specific info.; First question for you to research as far as hydraulics are concerned-when you push the brake pedal, are you compressing the brake fluid? let me know what you come up with.

  5. Jon P says:

    I was going to mention something that nobody addressed except ruskins question at the end of his answer. But I’m not going to. DO YOUR HOMEWORK!

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