NDLI: Study on Cycle-To-Cycle Variations of CAI Combustion Using NVO Strategy

Content Provider	IEEE Xplore Digital Library
Author	Hua Li Yingnan Guo Peng Cheng Fafa Liu Enwei Jiang
Copyright Year	2010
Abstract	Based on the application of self-developed electro-hydraulic variable valve train (VVT), Controlled Auto-Ignition（CAI）was achieved with Negative Valve Overlap (NVO) strategy. This VVT system that replaced the original camshaft was mounted on the head of a modified single cylinder engine. The cycle-to-cycle variation of CAI Combustion was investigated under several different operating points with 100 consecutive cycles sampled and stored. The experimental results indicated that as the excess air coefficient increases, with fixed engine speed and valve event, the coefficient of variation of indicated mean effective pressure (CoVIMEP) dropped firstly and then increased. The CoVIMEP had the minimum value when the excess air coefficient ranges from 1.1 to 1.3. The engine speed and the valve lift showed the potential to influence CoVIMEP. Increased engine speed led to a more intense mixing progress, which introduced high intensity turbulence into the cylinder and resulted in a higher level of charge homogeneity at the end of compression stroke, and finally a steady CAI combustion. Meanwhile, decreasing the valve lift had a relatively minor effect. The variation of IMEP was consequently suppressed to some extend.
Starting Page	1
Ending Page	4
File Size	325624
Page Count	4
File Format	PDF
ISBN	9781424487769
e-ISBN	9781424487783
DOI	10.1109/LEITS.2010.5665034
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-11-26
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Computer aided instruction Ignition Valves Combustion Timing Fuels
Content Type	Text
Resource Type	Article

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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