Experimental investigation of cyclic variations in HCCI combustion parameters for gasoline like fuels using statistical methods

Rakesh Kumar Maurya and Avinash Kumar Agarwal

Applied Energy, 2013, vol. 111, issue C, 310-323

Abstract: Homogeneous Charge Compression Ignition (HCCI) engines have potential for excellent fuel economy and extremely low emissions of NOx and PM. HCCI engines however do not have any direct control on the start of combustion timings, which makes HCCI combustion control extremely challenging. Characterization of cyclic variations of various combustion parameters is required for design and development of closed loop control of HCCI engines. Combustion stability and cycle-to-cycle variations of HCCI combustion parameters using gasoline like fuels (methanol, ethanol and butanol) were investigated in a modified four-cylinder, four-stroke engine. The experiments were conducted by varying the intake air temperature (Ti) and relative air–fuel ratio (λ) as well as engine speed. In the steady state engine operation, cylinder pressure signals for 2000 consecutive engine cycles were acquired for each test condition. From this large volume of experimental data collected, cyclic variations of various combustion parameters were analyzed. To evaluate the cycle-to-cycle variations of HCCI combustion parameters, statistical parameters such as coefficient of variation (COV) and standard deviation of each parameter were calculated for all test conditions. Combustion phasing was also analyzed by fitting different probability density functions (statistical distributions). Best-fit distribution for all test conditions can then be used for predicting and controlling the HCCI combustion timing for engine control.

Keywords: Homogenous charge compression ignition; Premixed charge; Methanol; Ethanol; Butanol; Cyclic variations (search for similar items in EconPapers)
Date: 2013
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (17)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0306261913003930
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:111:y:2013:i:c:p:310-323

Ordering information: This journal article can be ordered from
http://www.elsevier.com/wps/find/journaldescription.cws_home/405891/bibliographic
http://www.elsevier. ... 405891/bibliographic

DOI: 10.1016/j.apenergy.2013.05.004

Access Statistics for this article

Applied Energy is currently edited by J. Yan

More articles in Applied Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().