We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Effective method for knock signal denoising in internal combustion engine.
- Authors
Moshrefi, Amirhossein; Shoaei, Omid
- Abstract
Uncontrolled expansion of combustion wave in spark ignited internal combustion engine causes knock effect which seriously degrades efficiency and lifetime of the engine. Thus, accurate knock detection and control are essential for obtaining a desired performance from the engine. Usually, knock sensor is used to detect this phenomenon but it has limited accuracy especially at engine high-speed rotations because of natural vibration and external noises. In this study an effective method based on Non-Local Mean (NLM) algorithm has been proposed to improve the knock detection accuracy. This method is evaluated based on four different indicators and four engine cylinders. The results show 52.9 % improvement in knock detection. Also feasibility of real time execution of this method based on embedded hardware has been studied.
- Subjects
INTERNAL combustion engines; SIGNAL denoising; ENGINE cylinder testing; FEASIBILITY studies; ROTATIONAL motion
- Publication
International Journal of Automotive Technology, 2017, Vol 18, Issue 5, p769
- ISSN
1229-9138
- Publication type
Article
- DOI
10.1007/s12239-017-0076-7