Characterization of Particulate Emissions of Homogeneous Charge Compression Ignition Engines

  • Author / Creator
    Bullock, Dallin S
  • The particle size distribution, volatility, and effective density of particulate matter are measured using a cooperative fuel research engine during motoring, spark ignition, and homogeneous charge compression ignition. For all operating modes, less than 5% of the particulate mass remains when denuding the sample at 100 °C, and the particles for each operating mode have a relatively constant density with respect to particle size. A single cylinder engine with electromagnetic valves is used to test the effect of changing valve timing on particle emissions. An order of magnitude increase in particle concentration coincides with the valve timing changes, whereas the geometric mean diameter remains constant, suggesting that while the particle concentration increases due to timing changes, the mechanism for particle formation does not change. After a spike in particle concentration due to a timing change, the value quickly returns to steady-state levels.

  • Subjects / Keywords
  • Graduation date
    Fall 2013
  • Type of Item
  • Degree
    Master of Science
  • DOI
  • License
    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.