Brake Final Flashcards
To get 100 percent on the brake final
What is the purpose of the brake system?
To slow vehicle in a predictable and react to driver input
What is the Law of Conservation of Energy?
It states that energy cannot be created or destroyed
If two objects are traveling at the same speed and one has twice the mass, how much more kinetic energy does it have?
If going at the same speed it has twice the kinetic energy
The relationship to velocity is exponential, what does that mean?
It means if two objects have equal mass but one is trtaveling faster, the faster moving object has FOUR times the as much kinetic energy
What are the ways heat is transferred in the brake system?
Convection
Radiation
Conduction
What is the term brake lining referring to?
The brake pads on disc brakes and shoes on drum brakes
What is the term friction surface referring to?
The disc and the drum
Conduction is?
Heat transfer through contact
What is the difference between natural and forced convention?
Natural convection is at work even at rest, forced convection is using mechanical means and centrifugal force to cool the system
What is the term heat sink mean?
A large mass to store heat energy
The majority of the disc’s mass if for?
Strength and heat absorption
Define the term COF?
The Coefficient of Friction is the relative amount of friction between two surfaces
What is brake fade?
When the brakes are too hot, effectively having no friction to slow the vehicle
What is the difference between static friction and kinetic friction?
Static friction is the friction between stationary surfaces in contact. Kinetic friction is the forces that oppose the motion of a moving object
What is regenerative braking?
When a generator converts the kinetic energy in electrical energy
Throughout the range of temperatre, the brake fluid must maintain certain criteria, name them
Boiling point and viscosity
Name the brake fluid characteristics (7)
Miscibility Stability Rubber compatibility Non-Corrosiveness Lubrication Hygroscopicity
Brake fluid can damage?
Other rubber components and paint
Brake fluid has three different ratings, name them
DOT 3
DOT 4
DOT 5
What are the aspects of liquid and liquid systems?
Liquids are not compressible
The pressure is the same in a closed system
What is the basic principle in regards to the transmission on the pressure in confined spaces?
Pressure ina confined area is exerted equally in all directions
Fluid pressure is determined by what two factors?
Amount of pressure in the system
And the working surface area
Pressure equals?
Force divided by area
Two ways to increase force in the hydraulic system?
Larger output pision
Smaller input piston
The difference between Dynamic and Static fluid systems?
Hydrodynamic means the fluid is in motion
Hydrostatic means very little fluid movement
