Electromagnetic Variable Valve Timing on a Single Cylinder Engine in HCCI and SI

• Author / Creator

  Mashkournia, Masoud

• An experimental single cylinder engine with variable valve timing is used to study spark ignition and homogeneous charge compression ignition (HCCI). The discrete wavelet transform, on a single cylinder engine with a cam-phasing head, is used in real time for knock detection in HCCI. Classical control schemes are used by modulating fuel octane number to show real time knock control is possible with this detection scheme. The cam-phasing head is replaced with a electromagnetic variable valve timing head and stable spark ignition (SI) and HCCI operating points are found. The robustness of the valve controller is shown by making cycle by cycle switches of valve timing events in SI and HCCI. The effect of heat on the valves from operating in SI is shown to affect valve performance. A valve motion controller, which was designed and developed as a model in simulation, has been installed on a single cylinder engine and tested. The resulting valve motion control works well providing both a robust single cylinder test system with flexible valve timing and also a simulation test bed to develop valve motion control algorithms.

• Subjects / Keywords

  • Electromagnetic
  • HCCI
  • SI
  • Valve Timing
  • Knock

• Graduation date

  Fall 2012

• Type of Item

  Thesis

• Degree

  Master of Science

• DOI

  https://doi.org/10.7939/R3Z131

• 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.