AFM 101 - Noise, Vibration and Harshness

2 Credits, 3 Contact Hours
1 lecture period 2 lab periods
Noise, Vibration and Harshness (NVH) related concerns to a vehicle system. Includes characteristics and aspects of NVH, such as diagnostic tools, equipment and repair methods.

Information: Students who successfully complete this course may receive Service Technician Specialty Training credit from Ford Motor Company for Noise Vibration and Harshness Diagnosis.

Course Learning Outcomes

Evaluate noises, vibrations and harshness-related malfunctions in wheel/tire, engine, and driveline systems.
Assess causes of and solutions to vibrations associated with wheel and tire systems.
Analyze wind noise and water leak sources, causes, diagnostic and repair methods.
Diagnose NVH concerns using Ford’s VMS system and associated tools.

Outline:

NVH Fundamentals
1. Terminology
2. Units of measure
  1. Frequency
    1. Pitch
    2. RPM
    3. Hertz
  2. Amplitude
    1. Volume
3. Order Of Vibration
  1. First Order Vibration
  2. Second Order Vibration
  3. Third Order Vibration
  4. Fourth Order Vibration
    1. Component group
      1. Wheels/Tires/Axles
      2. Powertrain
      3. Driveline
Measuring tools and diagnostic methods
1. Use of standardized, detailed concern documentation
2. Test Procedures
  1. Vibration
    1. Vehicle Measurement System Software
    2. Other electronic calculative devices
    3. Sirometer
    4. Reed Tachometer
  2. Sound
    1. Sound amplification devices
    2. Ultrasonic penetrating devices
  3. Harshness
    1. Like units
      1. Customer Expectations
Solutions and repair methods
1. Vibrations
  1. Wheels/Tires/Axles
    1. Dynamic balancing
      1. RoadForce®
    2. Runout
    3. Match-mounting
    4. Indexing
  2. Powertrain
    1. Powertrain mount neutralization
    2. External component isolation and replacement
  3. Driveline
    1. Operating angle measurement and adjustment
    2. Driveshaft indexing
    3. Driveshaft balancing

Effective Term:
Fall 2024