How are hydraulics used in car brakes?

Question

Help me...

Answer 1

Liquids, being incompressible, are used instead of wires for better transmission of pressure to brake disks and drums.
The modern design can be seen at one of the natl, autoparts websites.

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Answer 2

the braking system is filled with a hygroscopic fluid (means it takes on water, which is why it is required to be changed). As you cant compress a fluid, when the pedal is pressed a piston (called the master cylinder) applies pressure to the fluid causing the fluid to move along the brake hoses/lines and causes a calliper (discs and pads) or slave cylinder (drum brakes) to operate. If the fluid is old and has a high water content the water will boil within the brake hose causing an air pocket to occur and a spongy feel to the pedal. This condition leads to inefficient brakes as the gas can be compressed, causing the effective pressure increase generated by the master cylinder to be lessened. The whole thing works on the principal that a liquid cannot be compressed. Hope it helps!!

Answer 3

Hydraulics are simply using the same principle of leverage but the force is transmitted through liquid which can be applied to connections levers cannot.

Say you have a teeter totter lever with the fulcrum in between the two ends and you apply one unit of force downward you will get one unit of force upward at the other end. If you move the fulcrum this changes the ratio of force. Likewise the ratio of force which is applied to the brake pedal is changed to a greater force traveling less distance at the brake. This change in the ratio does not use a fulcrum but uses the difference in the area of the cylinders which displaces diverse amount of fluid compared to the amount of distance moved. A brake pedal may move two inches and transmit all that force to move the brake pad one eighth of on inch. That would be an 8 to one ratio much as a fulcrum positioned one eighth of the way between two ends of a lever would translate the force according to the same ratio.

A lever system could not be used since the connection between the brake pedal and the brakes would not allow for a multiple application of leverage force from the brake pedal. Hydraulics are mathematically the same as levers but are much more adaptable.

Answer 4

Every time you press your foot down on the car brake pedal the movement of the pedal creates pressure in the master cylinder which contains oil. This pressure is transmitted down brake piping to the slave cylinders on each wheel brake assembly. The hydraulic pressure causes the pistons in the slave cylinders to move and come into contact with brake shoes which in turn contact and slow down the rotation of the brake plates and thus the rotational speed of the wheels causing the car to slow down and eventually stop. What I am trying to say is yes hydraulics are used in car brakes.

Answer 5

If you will imagine a steel rod ie,, the brake fluid,, in a pipe you push on one end of the rod and the rod slides out the other. that is the effect of brake fluid in a hydrolic setting take the same pipe add a lever which is activated by pressure on one end and take a plunger and fill the pipe with brake fliud with no air in the pipe push the air tight plunger into the other side,, now push the plunger this will activate the device on the other side of the pipe. now look at a brake system with fluid your pedel is the plunger the lever is your brake cylinders at your shoes or your caliper piston . It has to be air tight other wise you will get the sponge effect when you apply the pedel no air can be in the system that is why people bleed the brakes if air has been introduced into the system

Answer 6

When you put your foot on the brake peddle it pushes onto a diaphragm which in turn pressurises the fluid in the brake pipes.
if you mean a full hydraulic system the this works off a hydraulic pump when the peddle is pressed it opens a discharge valve on the pump, the pump then pressurises the brake lines and activates the brakes. this last type is generally used on large vehicles such as heavy plant and articulated lorries.

Answer 7

yes, When you hit the brake pedal, it actuates a plunger in the master cylinder. That plunger forces brake fluid down through your brake lines to the caliper which forces a piston to push on the brake pads and squeeze the rotor. This causes you to slow down and stop. The pressurizing of fluid is hydraulics

Answer 8

The hydraulics transfer the pressure from the brake foot pedal to the brake caliper pistons or brake shoes to stop or slow down the car

Answer 9

Think of a canal. When the lock gates are shut and the water is just a fraction up the gate but you cant open the gate. Why?
Explanation. The air pressure pressing down upon the water in the canal is transferred to the small area of water pressing upon the gate. So theoretically when trying to open the lock gate you are trying to lift the whole canal.
The pressure exerted by you foot upon a brake goes into the brake cylinder and is similarily transferred across the tiny area of the brake pipe. The pressure of your foot is multiplied massively upon the brake pads and shoes etc.

Answer 10

The fluid in the master cylinder, brake lines, and wheel cylinders/calipers cannot comress so when it is forced through the brake lines by the master cylinder, it transfers that force applied at the master cylinder to the other end of the line: the wheel cylinders in a drum brake arrangement that, in turn, forces the brake shoes against the drums stopping the vehicle or in a disc brake arrangement forcing the pads into contact with the rotor bringing the vehicle to a stop.

Answer 11

Hydraulic systems use a fluid,,such as oil or brake fluid,,etc,,,a piston is driven into a cylinder filled with such fluid,,and the fluid is then displaced and pushed through whatever lines or conduits to act on another piston at the opposite end providing a mechanical movement,,or lever.
take a drinking straw,,and put a small bead inside,,,and then blow fluid through the straw,,and you will see a visual representation of what i mean.