Browse Publications Technical Papers 2019-26-0191
2019-01-09

Design, Simulation & Optimization of an Air Intake System to Reduce Induction Noise 2019-26-0191

Air intake system (AIS) plays a major role in reducing the noise level in passenger car compartment, which has become an important requirement due to increasing customer expectation for better in cab noise. The ideal air intake system design should have minimum possible noise at snorkel entry point which ultimately contributes in cabin noise.
There are different techniques that are implemented for an air intake system noise reduction e.g. choosing proper location of air entry suction point in engine bay compartment, suitable design for air filter box (volume), duct designs etc. Further design improvement are possible with an addition of tuned resonators in the system.
An addition of resonator have major effect seen in reducing air induction noise and to meet target Sound Pressure Levels (SPL). But at the same time, selecting the correct type of resonator, its position & volume, frequency/s band at which resonator is tuned are important parameters.
The work presented here describes and compares the simulation results (GT POWER) with the measured SPL levels at different rpm range with different resonator types for Utility Vehicle (UV) as below,
  1. a
    Air intake system without resonator.
  2. b
    Multi-band resonator: resonator tuned for larger range of frequency band and requires more packaging volume.
  3. c
    Helmholtz resonator: resonator tuned for single frequency (for certain rpm at which peak observed) & requires less packaging volume.
Based on the correlation developed between simulation and test results, the simulation models are useful for further refinement and proper selection of final optimum hardware. These simulation models are also further useful for future programs at design stage itself.

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