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Testing and Validation

Noise emissions and vibrations strongly influence perceived brand value and determine product engineering quality.
Noise containment is quintessential to comply to ever increasingly strict regulations. Vibrations, as well as reducing passenger comfort, contribute to fatigue and structural issues.

NVH Testing Services

Acquisition and analyses of vibrational engine-related phenomena, torsional vibration measurements, transmission vibro-acoustic emissions (like gear whine and rattle testing), transmission sensibility testing, noise intensity mapping, noise source identification and classification, sound pressure level and quality, Transfer Path Analyses, Operative Modal Analysis, component vibrational quality testing. By liaising with specialist test houses, Dipolo can extend its offer capabilities even further.

Engine NVH Testing

  • Engine irradiation measurements
  • Acoustic holography
  • Filtering Engine dowels
  • Modal analysis of the power plant
  • Ticking noise
  • Turbo Noise
  • Piston Slap
  • Misfiring

Transmission NVH Testing

  • Gear whine noise (Airborne – Structural borne)
  • Gear Rattle Noise
  • Idle Rattle
  • Filtering Torsional Flywheel – Gear Input Shaft
  • Filtering engine supports
  • Modal analysis of the gear and leverage
  • Shift lever vibration

End of Line

End of Line tests aim is to guarantee that a product complies with the respective specifications, performance and quality requirements of vibro-acoustic.
The criteria for the vibro-acoustical quality are generally provided by the customer. Once defined the range of admissibility, all parts will be tested and only those within the limits will go the way to next assembly steps.

Wind Tunnel Testing and
Data Correlation

Preparation and conduction of wind tunnel test sessions for flow analyses, with measurements of the aerodynamic forces and moments on the vehicle. Dipolo provides data analysis services and integration with CFD and track test data. Contacts with facilities of different sizes and characteristics, for customer’s best benefit-cost ratio.

Electronic Vehicle Control Systems (Controls)

In modern vehicles, there are many complex operational systems, often managed electronically by a control unit.
Our engineers are involved in the development and validation of hardware/software of electronic control applications for engine (ECU), transmission (TCU) and whole powertrain module (PCM).

Purposes of software development and validation

  • Tests for new software release for engine control modules
  • Anomalies and solutions analyses
  • Calibration of engine software run on vehicle and by a simulator in order to find the optimal solutions for driving comfort
  • Calibration of control unit for mechanic and automatic transmissions (dual clutch application)