Experimental Investigation of Deterministic and Random Cyclic Patterns in HCCI Engine using Symbol Sequence Approach
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Homogeneous charge compression ignition (HCCI) combustion emerged as promising technology for automotive pollution reduction. One of the major challenges for commercial application of HCCI combustion engine is to control the combustion in different engine operating conditions. Characteristics of HCCI cyclic variations are required for efficient control of combustion phasing. Cyclic variability has both stochastic and deterministic components. In this study, cyclic variations of IMEP and combustion duration in a HCCI engine are analyzed using symbol sequence method. To analyze the cyclic variations, 1500 consecutive engine cycle data are logged and processed. Results reveal that there is deterministic component in cyclic variations, which could lead to effective control strategies. Results confirm that in symbol sequence method optimal combination of number of partition and sequence length is dependent on engine operating conditions and selected combustion parameters. It is also found that controller should have information about more than just immediate previous cycle for effective control of HCCI engine.
KeywordsHCCI Combustion stability Cyclic variation Symbol sequence Combustion Engine Gasoline
The author wishes to acknowledge the support extended by CAD laboratory of IIT Ropar for sparing their computational facilities for this work. The author sincerely acknowledges the suggestions and help from Prof. A.K. Agarwal of IIT Kanpur during the author’s doctoral project in which cylinder pressure data were logged.
- Ball JK, Raine RR, Stone CR (1998b) Combustion analysis and cycle-by-cycle variations in spark ignition engine combustion—Part 2: a new parameter for completeness of combustion and its use in modeling cycle-by-cycle variations in combustion. Proc Inst Mech Eng D J Automob Eng 212(6):507–523CrossRefGoogle Scholar
- Finney CEA, Green JB Jr., Daw CS (1998) Symbolic time-series analysis of engine combustion measurements. SAE Technical Paper 980624Google Scholar
- Heywood JB (1988) Internal combustion engine fundamentals. McGraw Hill Press, New YorkGoogle Scholar
- Hultqvist A, Christensen M, Johansson B, Richter M, Nygren J, Hult J, Alden M (2002) The HCCI combustion process in a single cycle—high speed fuel tracer LIF and chemiluminescence imaging. SAE Technical Paper 2002-01-0424Google Scholar
- Li HL, Neill WS, Chippior W, Taylor JD (2007) Cycle-to-cycle variation of a HCCI engine operated with n-heptane. Spring Technical Meeting Combustion Institute/Canadian SectionGoogle Scholar
- Maurya RK, Agarwal AK (2009a) Experimental investigation of cycle-by-cycle variations in CAI/HCCI combustion of gasoline and methanol fuelled engine. SAE Technical Paper 2009-01-1345Google Scholar
- Ozdor N, Dulger M, Sher E (1994) Cyclic variability in spark ignition engines: a literature survey. SAE Technical Paper 940987Google Scholar
- Persson H, Pfeiffer R, Hultqvist A, Johansson B, Strom H (2005) Cylinder-to-cylinder and cycle-to cycle variations at HCCI operation with trapped residuals. SAE Technical Paper 2005-01-0130Google Scholar
- Scholl D, Russ S (1999) Air-fuel ratio dependence of random and deterministic cyclic variability in a spark-ignited engine. SAE Technical Paper 1999-01-3513Google Scholar
- Shi L, Deng K, Cui Y (2007) Combustion stability of diesel-fueled HCCI. Int J Automot Technol 8(4):395–402Google Scholar
- Wagner RM, Drallmeier JA, Daw CS (1998) Prior-cycle effects in lean spark ignition combustion—fuel/air charge considerations. SAE Technical Paper 981047Google Scholar