International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056 Volume: 04 Issue: 04 | Apr -2017 www.irjet.net p-ISSN: 2395-0072 © 2017, IRJET | Impact Factor value: 5.181 | ISO 9001:2008 Certified Journal | Page 3012 Investigation of emission parameters on HCCI Engine using chemical kinetics D Bhaskar 1 , J Naveen Reddy 2 , Ch Sai Siva Reddy 3 , M Pavan 4 , J Shreenath 5 1 Assistant Professor, Mechanical Engineering Dept., K L University 2345 Final Year B-tech, Mechanical Engineering Dept., K L University ---------------------------------------------------------------------***------------------------------------------------------------------- Abstract - Homogeneous Charge Compression Ignition makes the utilization of the resources for complete combustion and is similar to that of hot bulb technology. In these, the main point is to supply the exact mixture of fuel and oxidizer to the combustion chamber to attain auto ignition. The characteristics of these technology resemble the combination of both spark and compression ignition Engine. The Engine which result in these combination provide higher efficiencies better than the conventional Engines. Diesel as the fuel and performing computation results by using CHEMKIN 17.0 with HCCI Engine parameters that are previously done on the experimental scale provides the liability for further investigation on different compositions to find reduced emission rates by performing auto ignition. Spectroscopy methods provides the necessary species that provides auto ignition. The species responsible for these condition are HO2, CH2O and O. Formation of these species can be visualized in the fuel combustion kinetics provided by CHEMKIN 17.0. Emission rates on diesel are compared by varying fuel grades and equivalence ratio. Keywords: Engine, HCCI, Auto ignition, Emission, Chemical kinetics. 1. INTRODUCTION Compression ignition Engine with its thermodynamic efficiency and lower pumping loses add an advantage to continue the usage in the commercial sector for a long time. While spark ignition Engine, due to its low emissions at exhaust gives additional benefit for environmental issues because of homogeneous mixture fuel and air. In these new technology which combines these two types is called as Homogeneous Charge Compression Ignition as the name indicates, in this HCCI Engine technology has SI Engine characteristics at inlet and compression strokes and has CI Engine characteristics at combustion and exhaust strokes. This technology results us in getting higher fuel efficiency and low emissions. HCCI Engine can be accepted over conventional Engines because of its performance, durable, sustainable and economical. Homogeneous Charge Compression Ignition reduce throttling losses. It meets the standards that are to be followed for emissions. Any alternate fuels and the conventional fuels can be used for the operation. As expansion ratio is increased using HCCI Engine results in increased thermodynamic efficiency than the conventional Engine. Emission can be controlled without the application of EGR system. In HCCI at normal compression ratio only the auto-ignition occurs and load limit can be extended which reduce the residuals in the fuel mixture to achieve the starting temperature of compression, mode of combustion as they are to be maintained in limits. HCCI Engine combustion should be started after the auto ignition where the ignition timing can’t be controlled in practical because there will be variations in speed and power range. This leads to increase in emissions of HC and CO but reduction in NOx and SOx emissions. Pre-heating is done in order to provide additional energy to attain required auto ignition temperature to the in-cylinder load. Negative valve overlap is used for pre-heating but it is limited to low, medium loads only. Higher exhaust re-circulated will allow higher thermal loads because there will be