Electromagnetic Variable Valve Timing on a Single Cylinder Engine in HCCI and SIReport as inadecuate




Electromagnetic Variable Valve Timing on a Single Cylinder Engine in HCCI and SI - Download this document for free, or read online. Document in PDF available to download.

SI, HCCI, Valve Timing, Electromagnetic, Knock

Mashkournia, Masoud

Supervisor and department: Dr. Charles Koch Mechanical Engineering Dr. Rudolf Seethaler Mechanical Engineering from UBC Okanagan

Examining committee member and department: Dr. Jason Olfert Mechanical Engineering Dr. Bob Hayes Chemical Engineering

Department: Department of Mechanical Engineering

Specialization:

Date accepted: 2012-06-14T15:30:06Z

Graduation date: 2012-11

Degree: Master of Science

Degree level: Master's

Abstract: 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.

Language: English

DOI: doi:10.7939-R3Z131

Rights: Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.





Author: Mashkournia, Masoud

Source: https://era.library.ualberta.ca/


Teaser



University of Alberta Electromagnetic Variable Valve Timing on a Single Cylinder Engine in HCCI and SI by Masoud Mashkournia A thesis submitted to the Faculty of Graduate Studies and Research in partial fulfillment of the requirements for the degree of Master of Science. Department of Mechanical Engineering c Masoud Mashkournia Fall 2012 Edmonton, Alberta Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only.
Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author’s prior written permission. Abstract 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...





Related documents