18-04-2012, 03:10 PM
Noise Control for Internal Combustion Engine Exhaust
Week 5 Review Rev2.pptx (Size: 2.8 MB / Downloads: 445)
Introduction
FSAE rules dictate engine noise under 110dB.
Current Passive Noise Control device (Glass pack) holds engine sound from wide range above and below 110dB
Current technology is not tuned for optimal noise reduction or engine performance
Design Objectives
Utilize Active / Passive Noise Cancellation Technology to:
Maintain engine output under FSAE limit of 110dB.
Adhere to all FSAE Rules
To not add significant weight to vehicle
Maintain/Improve engine performance
Lower Vehicle Center of Gravity
Glass Pack
Exhaust Travels through Pipe with Perforated Holes
Sound Insulation Absorbs Sound
Minimal Back Pressure
Least Effective in Reducing Sound
Turbo Muffler
No Baffles
Exhaust Forced to turn back and forth
Increases Exhaust Length
Increased Back Pressure with each turn
Sound Insulation Absorbs Sound
Moderately Effective in Reducing Sound