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Stealth CAT’s

This project led by Eric Buddrius, Amanda Bolland, Ian Lootens, and Greg Hilbert focuses on developing a muffler that meets National Park emissions standards, specifically targeting carbon monoxide and unburned hydrocarbons. The design utilizes advanced concepts like destructive interference and low back pressure for effective sound dampening. We employed a rigorous testing timeline using methods such as the Ricardo Wave and J.192 to evaluate performance. Key milestones include detailed flow bench tests, various design iterations, and final testing on a sled, culminating in a high-performance, environmentally-friendly muffler.

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Stealth CAT’s

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Presentation Transcript

  1. Stealth CAT’s Eric Buddrius Amanda Bolland Ian Lootens Greg Hilbert

  2. Specifications

  3. Catalyst • Aristo Contact is Bob McDowell • Goal: to meet National Park Standards • Focus: Carbon Monoxide and Unburned Hydrocarbons emissions

  4. Muffler Basics • Two Main Functions • Reflection • Most Effective • Destructive Interference • High Back Pressure • Restriction • Most Common • Cheapest • Absorption • Simple with Low Back Pressure • Low Damping

  5. Hushpower technology Entry Cone B. Laminar Flow Area C. Thermal Barrier D. Exit Cone

  6. Design Evaluation • Flow Bench • Ricardo Wave • J 192 Testing Procedure • Timeline

  7. Flow Bench Test Stand Settling Chamber Mass Flow Meter Vacuum Supply

  8. Flow Bench • Active Flow Bench • Vacuum source • Test Part • Multiple uses • Cylinders • Porting • Mufflers • Air filters • Measures • Pressure differential with respect to mass flow

  9. What is Ricardo Wave?

  10. Mufflers in Ricardo Wave

  11. Ricardo WNoise

  12. Ricardo Wnoise output

  13. J 192 Sound Test

  14. SOUND Testing • Existing Muffler • Laminar Flow Muffler • Hushpower Muffler • Affect of Packing • Small vs. Large Cone Perforation • Series • Parallel

  15. Timeline • November 29th – Start J192 Sound Testing of Existing Mufflers • December 10th – Complete Flow Bench • December 15th – Flow Test Existing Mufflers • December 17th – Final Muffler Designed • January 15th – Receive Final CAT • January 21st – Final Muffler Built • January 22nd – Begin Testing Final Muffler on Sled • March 4th – Leave for Competition

  16. Questions?

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