•Brake fluid plays a crucial role every bit it transfers the forcefulness created when a driver presses the brake pedal straight onto the bicycle hub.
•Heat generated nether braking, specially nether heavier breaking or prolonged breaking, may touching the brake fluid which tin give notice solely move if it is liquid in addition to non in addition to so hot that it has larn vapour.
•Therefore the boiling indicate your brake fluid achieves is critical to efficient braking every bit temperatures inwards a higher house the boiling indicate bird vapour bubbles inwards the system, potentially resulting inwards brake failure.
•In addition, the brake fluid serves every bit a lubricant of all movable parts in addition to prevents corrosion. It has to live compatible amongst prophylactic seals in addition to hoses thus allowing braking systems to attain long service in addition to optimal performance
what are the basic characteristics of brake fluid?
•1. Oil point: Due to high temperature during the braking applications brake Fluid should convey high boiling point, to avoid vapour formation. Boiling indicate should live by in addition to large about 25O-3OOC.
•2. Viscosity: Due to variations inwards weather condition conditions from really mutual frigidity to hot it becomes imperative that the viscosity of the brake fluid should vary niggling amongst temperature to proceed optimum menstruation conditions. So viscosity should live such that, menstruation come about inwards pipes easily without whatever temperature variations.
•3. Lubrications properties : Brake fluid should convey proficient lubrication properties in addition to so that proper lubrications of braking components (e.g. master copy cylinder) is done
PROPERTIES OF BRAKE FLUID
1) Thin viscosity, fifty-fifty at lower temperatures (they are tested at -40oC)
2) Must live compatible amongst the seals inwards the braking system
3) Reasonably non-compressible
4) High boiling point
5) Good at non absorbing water
6) H5N1 proficient lubricant of moving parts
7) Long-lasting
To attain these properties, modern brake fluids are made of glycol ethers in addition to borate esters, mixed amongst diverse corrosion inhibitors. They are completely different whatever fossil oil used inwards engines.
Brake fluid types
Two types of braking fluids are used inwards braking applications
•Polyglycol: is unopen to amber inwards its color in addition to the nearly usually used braking fluid used inwards the industry.It is a solvent in addition to volition forthwith commence to dissolve the pigment when merely reaching it. From its primary disadvantages that it has a high might to absorb H2O directly. Water tin give notice live absorbed through the hoses in addition to the seals in addition to enters the master copy cylinder reservoir cap, wet inwards the hydraulic circuit reduces the boiling indicate of the braking fluid in addition to causes it to evaporate. In add-on the wet causes metallic parts to erode in addition to rust causing the leakage or frozen bicycle cylinder pistons.
•Silicone: is majestic inwards color, it’s non hygroscopic (don`t attract water) in addition to thus don`t convey rust or corrosion problems.
•DOT3
This is the normal specification for many of the cars on the route today, amongst boiling points inwards the percentage of 200oC (dry) in addition to 140oC (wet). This type of fluid should live changed inwards accordance amongst the manufacturer’s guidelines
•DOT4
This is likewise a mutual specification for route cars, but amongst higher boiling points than theDOT3 fluids (230-270oC dry, 160-170oC wet) where brakes are probable to generate to a greater extent than heat,
For example, functioning route cars. As amongst the DOT3 fluids, these ones are glycol based.
•DOT5
These are non relevant to route use. They are silicon based, different the other brake fluids listed in addition to are hydrophobic, in addition to so they create non absorb H2O in addition to are thus extremely long life fluids. These fluids are non suitable for the vast bulk of the vehicles inwards usage today, but are for sure enough armed forces vehicle purposes, every bit good every bit a few other non-mainstream applications.
The boiling points for DOT5 fluids are merely about 260oC dry out in addition to 180oc wet. The 'wet ‘boiling indicate is slightly different to normal brake fluids every bit H2O cannot larn inwards the fluid, it tin give notice solely live a 'wet' fluid if at that topographic point is H2O inwards the braking system.
•DOT5.1
This is some other glycol (unlike the DOT5 fluids) based fluid that is used inwards normal route in addition to functioning cars. Due to the formulation of the fluid, it is longer lasting than the DOT3 andDOT4 fluid, although the boiling points may non live much higher than the DOT4 fluids at about 270-280oC dry out in addition to 185oC wet. Do non confuse these fluids amongst the much rarer DOT5ones.
•Super DOT4
These are the summit functioning brake fluids available. They are similar a DOT4 inwards damage of the chemic components used in addition to life bridge of the fluid, but they are formulated to give extremely high boiling points (generally inwards excess of 300oC dry out in addition to 190oC wet). These are
The fluids that are used inwards the summit levels of motorsport, but are all the same suitable for route use, in addition to so they are ideal for vehicles used on route in addition to track Sumber http://mechanicalgalaxy.blogspot.com/
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