Document 0JG3YQK54rx4ZBYD9OdwVN5eJ

TABLE 2. INFLUENCE OF SOME BRAKE LINING PROPERTY CHANGES ON BRAKE SYSTEM RESPONSE WITH DESIGN MODIFICATIONS TO COMPENSATE F ric tio n P ro p e rtie s Change of Brake Lining Properties Potential Response of Brake System Lower Friction Coefficients - Front brakes - Rear brakes - Both front/rear i Greater Pedal Forces Required, Leading to: . - Early rear skid - Early front skid - Low brake capacity Higher Friction Coefficients - Front brakes - Rear brakes - Both front/rear Lower Brake Pedal Force Required. Leading to: - Early front skid - Early rear skid - "Touchy" pedal Poor Fade Characteristics -'Green fade - Thermal fade - Hater fade - Flash fade Inconsistent Friction Level - Green linings - Usage history - Wear depth - Within batch - Batch-to-batch High Brake Pedal Force Required For: - Initial hot brake - Any hot brake, - Wet brakes - High speed stops Varied Brake Pedal Forces Needed With: - New brake linings - Temperature change - Mileage driven - Brake Imbalance - Car-car variations Environmental Sensitivity - Water/water vapor, - Road dust - Oily contaminants ^ - Oxide/rust effects Brake Pedal Force Sensitive to: - Humidity - Dust pickup - Road rain splash - Moist storage Lower Compression Modulus Higher Brake Pedal Travel Higher Compression Modulus Noise and Uneven Effectiveness Higher Thermal Expansion/Growth Brake Dragging and Hot-Spotting Lower Tensile Strength Lining Fracture, Cast Iron Scoring Lower Toughness Handling Breakage 16 Needed Design Modifications Larger Booster or Small Master Cyl. - Big front w.c. - Big rear w.c-. * - System redesign Smaller Booster/ Big Master Cyl. - Small front w.c. - Small rear w.c. - System redesign Recalibrate/Add Booster - Scorch linings - Modify linings - Shield brakes - Modify linings Change Linings/ Redesign Brake - Modify linings - Modify linings - Modify linings - Improve process - QC improvement Change Linings/ Redesign Brake - Modify linings - Shield brakes - Shield brakes - Materials change Redesign/Stiffen Actuation System Reduce Shoe/Drum Stiffness Add Clearance or Thin Linings Use More Rivets, Bond/Hold Linings Alter Processes Mechanical P ro p e rtie s