Design #2
We learned from the visits with the Nissan and Tenneco that our scrubber design needed to incite some kind of spiral motion within the exhaust to maximize it's contact with the carbon. Additionally, we learned that we needed to take exhaust temperature into account, and refocus our design based on whether we wanted it to be pre-muffler or post-muffler. Lastly, we decided that exhaust flow was a major concern that we needed to keep in mind. The images below reflect the changes we made to our original design to improve airflow, exhaust contact time with the carbon, and temperature concerns.
While we were in the process of designing our second prototype, we also built a metal version of our first design it to test on an actual vehicle. This version was built out of an actual emission pipe. The inside was constructed out of an perforated aluminum sheet, manipulated to resemble our activated charcoal chamber on the 3D printed design. This second design featured a slightly different than the original; rather than tapering at the end, we kept the cylinder one uniform size to maximize airflow and minimize back pressure.
Cost
- Exhaust pipe was donated by a local scrap metal company
- 3D printing and materials were free on behalf of Central Magnet School