UAFM 101 - Noise, Vibration, and Harshness

Skills and knowledge required to pinpoint Noise, Vibration and Harshness (NVH) related concerns to a vehicle system. Characteristics and aspects of NVH, use of NVH diagnostic tools and equipment, repair methods.

Course Learning Outcomes:

Demonstrate comprehension of how normal and abnormal noise, vibrations and harshness (NVH) manifest in automobiles.
Demonstrate comprehension of powertrain-related vibrations, diagnostic techniques, and repair methods.
Demonstrate comprehension of driveline-related vibrations, diagnostic techniques, and repair methods.
Demonstrate comprehension of wheel-related vibrations, diagnostic techniques and repair methods.
Demonstrate comprehension of wind noise and water leak sources, causes, diagnostic and repair methods.
Analyze, interpret, and diagnose NVH concerns using Ford’s VMS system and associated tools

Outline:

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