LAPSE:2019.1617
Published Article
LAPSE:2019.1617
Wavelet Analysis of the Effect of Injection Strategies on Cycle to Cycle Variation GDI Optical Engine under Clean and Fouled Injector
Omar I. Awad, Zhou Zhang, Mohammed Kamil, Xiao Ma, Obed Majeed Ali, Shijin Shuai
December 16, 2019
High fluctuation in cyclic variations influences engine combustion negatively, leading to higher fuel consumption, lower performance, and drivability problems. This paper examines the impacts of injection strategies (injection pressure, injection timing and injection duration) on the cyclic variation of gasoline spark ignition (SI) optical engine under clean and fouled injectors. The principal oscillatory modes of the cycle to cycle variation have been identified, and the engine cycles over which these modes may persist are described. Through the wavelet power spectrum, the presence of short, intermediate and long-term periodicities in the pressure signal have been detected. It was noticed that depending on the clean and fouled injector, the long and intermediate-term periodicities may span many cycles, whereas the short-period oscillations tend to appear intermittently. Information of these periodicities could be helpful to promote efficient control strategies for better combustion. The outcomes report that the cyclic variation of the IMEP happens on multiple timescales, and thus, display complex dynamics. As the fouled injector used, mainly intermittent high-frequency fluctuations are recognized.
Keywords
cycle to cycle variation, fouled injector, GDI engine, wavelet analysis
Suggested Citation
Awad OI, Zhang Z, Kamil M, Ma X, Ali OM, Shuai S. Wavelet Analysis of the Effect of Injection Strategies on Cycle to Cycle Variation GDI Optical Engine under Clean and Fouled Injector. (2019). LAPSE:2019.1617
Author Affiliations
Awad OI: State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China [ORCID]
Zhang Z: State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
Kamil M: Mechanical & Nuclear Engineering Department, University of Sharjah, Sharjah PO Box 27272, UAE [ORCID]
Ma X: State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
Ali OM: Renewable Energy Research Unit, Northern Technical University, Kirkuk 36001, Iraq
Shuai S: State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
Journal Name
Processes
Volume
7
Issue
11
Article Number
E817
Year
2019
Publication Date
2019-11-05
Published Version
ISSN
2227-9717
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Original Submission
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PII: pr7110817, Publication Type: Journal Article
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LAPSE:2019.1617
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doi:10.3390/pr7110817
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Dec 16, 2019
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Dec 16, 2019
 
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Calvin Tsay
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