Dimethyl Ether as an Ignition Improver for Hydrous Methanol Fuelled Homogeneous Charge Compression Ignition (HCCI) Engine
Homogeneous Charge Compression (HCCI) Ignition technology has been around for a long time, but has recently received renewed attention and enthusiasm. This paper deals with experimental investigations of HCCI engine using hydrous methanol as a primary fuel and Dimethyl Ether (DME) as an ignition improver. A regular diesel engine has been modified to work as HCCI engine for this investigation. The hydrous methanol is inducted and DME is injected into a single cylinder engine. Hence, hydrous methanol is used with 15% water content in HCCI engine and its performance and emission behavior is documented. The auto-ignition of Methanol is enabled by DME. The quantity of DME varies with respect to the load. In this study, the experiments are conducted independently and the effect of the hydrous methanol on the engine operating limit, heat release rate and exhaust emissions at different load conditions are investigated. The investigation also proves that the Hydrous Methanol with DME operation reduces the oxides of Nitrogen and smoke to an extreme low level which is not possible by the direct injection CI engine. Therefore, it is beneficial to use hydrous methanol-DME HCCI mode while using hydrous methanol in internal Combustion Engines.
 Duc PM, WattanavichienK. Study on biogas premixed charge diesel dual fuelled engine. Int J Energy Conversion and Management2007; 48: 2286-308.
 Bari S. Effect of Carbon dioxide on the performance of biogas/Diesel duel fuel engine. Int J Renewable Energy 1996; 9(3):1007
 Onishi S, Jo SH, Shoda K, Jo PD, Kato S. Active thermo-atmospheric combustion (ATAC) - a new combustion process for internal combustion engines.SAE1979; Paper No.790501.
 Najit PM, Foster DE. Compression –ignited homogeneous charge combustion. SAE1983; Paper No.830264.
 Ryan TW, Callahan TJ. Homogeneous Charge Compression ignition (HCCI) of diesel fuel. SAE1996; Paper No. 961160
 Garcia MT, Aguilar FJE, Lencero TS. Experimental study of the performances of a modified diesel engine operating in homogeneous charge compression ignition (HCCI) combustion mode versus the original diesel combustion mode. Energy2009; 34:159-71.
 Shi L, Cui Y, Deng K, Peng H, Chen Y. Study of low emission homogeneous charge compression ignition (HCCI) engine using combined internal and external exhaust gas recirculation (EGR). Energy2006; 31:2665-76.
 Swami Nathan S, Mallikarjuna JM, Ramesh A. HCCI engine operation with acetylene as the fuel. SAE2008; Paper No. 2008-28-0032.
 Swami Nathan S, Mallikarjuna JM, Ramesh A. Effects of charge temperature and exhaust gas recirculation on combustion and emission characteristics of an acetylene fuelled HCCI engine. Fuel2010; 89:515-21.
 Huang, H., Su, W., Pei, Y. Experimental and Numerical Study of Diesel HCCI Combustion by Multi-Pulse Injection. SAE 2008; Paper 2008-01-0059.
 Sona Visakhamoorthy, John Z. Wena, Siva Sivoththaman, Charles Robert Koch. Numerical study of a butanol/heptane fuelled Homogeneous Charge Compression Ignition (HCCI) engine utilizing negative valve overlap. Applied Energy 2012; 94; 166–173
 Zheng Z, yao M, Chen Z, Zhang B. Experimental study on HCCI combustion of dimethyl ether (DME) / Methanol dual fuel. SAE2004; Paper No. 2004-01-2993.
 Mack JH, Aceves SM, Dibble RW. Demonstrating direct use of wet ethanol in a homogeneous charge compression ignition (HCCI) engine. Energy2009; 34:782-7.
 DuretP. Gasoline CAE and Diesel HCCI: the Way towards Zero Emission with Major Engine and Fuel Technology Challenges. Society of Automotive Engineers2002; Technical Paper 2002-32-1787.
 Jacobs TJ, Bohac SV, Assanis DN, SzymkowiczPG. Lean and rich premixed compression ignition combustion in a light-duty diesel engine. SAE2005; paper no. 01-0166;2005.