Date of Award
Open Access Master's Thesis
Master of Science in Mechanical Engineering (MS)
Administrative Home Department
Department of Mechanical Engineering-Engineering Mechanics
Committee Member 1
Committee Member 2
Committee Member 3
Committee Member 4
Spark ignited two stroke engines are under increasing pressure as emissions standards become stricter, making them a perfect candidate for a catalytic aftertreatment system. Yet several significant challenges to catalysis exist. Namely two stroke exhaust systems are very sensitive to back pressure changes and high emissions concentrations can make controlling the temperature of the catalytic reaction difficult. Therefore, it is imperative that a two stroke specific catalyst design process be developed. This project focused on beginning to develop such a design process. Key results of this work include finding a location for the catalyst in the exhaust system that offers significant catalyst sizing freedom as well as exploring methods to estimate catalyst back pressure contributions and approximate conversion efficiency targets. Finally, using this design process, 3 actively coated catalyst samples were tested and showed significant reductions in HC and CO with less than a 2 Hp peak power loss.
Squires, Noah, "DESIGN AND IMPLEMENTATION OF AN OXIDATION CATALYST FOR A SPARK IGNITED TWO STROKE SNOWMOBILE ENGINE", Open Access Master's Thesis, Michigan Technological University, 2021.