The Basic Concepts Kinetic energy = heat

SAE Road Show II

Topics To Be Presented

The Basic Concepts

• Kinetic energy = heat

• F = ma

• Newton is always right!

• Do the calculations first

• When all else fails see rule 3.

Energy Conversion

Energy Conversion

F = ma

• F = ma

Hydraulic System Configurations

Front/rear Hydraulic Split

Typical Diagonal Split System

Four Sub-systems

• Actuation sub-system

Actuation Sub-system

Master Cylinders

M/C Unapplied

M/C Applied

Primary System Failure

Secondary System Failure

Proportioning Valves

Adjustable Proportioning valves

Brake Lines

• Brake Lines

Foundation Brake Sub-system

Front Disc Brake

Front Disc Brake

Brake Linings

• Brake linings are probably the most mis-understood part of a brake system.

• The output of any brake is directly related to the coefficient of friction (µ) between the lining and the disc or drum.

• The challenge is knowing what the instantaneous value of µ is during any given stop.

• Any design calculations you do, go right out the window if the lining you use does not have the µ value you assumed.

Brake Linings

Brake Balance

Both Front Wheels Locked:

Both Rear Wheels Locked:

Front Lock

Rear Lock

Optimum Braking

Calculating Dynamic Weight Transfer

Ideal Vs Actual Torque

Stopping Distance

Brake Fade

Formula SAE vs. Mini Baja

Mini Baja, Hostile Environment

• Mini Baja, Hostile Environment

Lessons Learned

Don’t Do Something Because:

Design to a Specific Objective:

Lessons Learned

• Lessons Learned

Lessons Learned

• Lessons Learned

Too light

• Too light

Lessons Learned

• Lessons Learned

Brake rules

• Brake rules

Any Questions