© 2018 IJRAR June 2018, Volume 5, Issue 2 www.ijrar.org (E-ISSN 2348-1269, P- ISSN 2349-5138) IJRAR19D1181 International Journal of Research and Analytical Reviews (IJRAR) www.ijrar.org 251 Experimental Analysis of Ignition Delay in Dual- Fuel Diesel Engine with Secondary Fuel D B Lata *a , Chandra Bhushan Kumar b a Department of Energy Engineering, Central University of Jharkhand, Ranchi, India b Department of Mechanical Engineering, Birla Institute of Technology, Mesra,Ranchi,India. Abstract. In the present research work, experiments were conducted on four cylinder water-cooled DI compression ignition diesel engine with diesel as base fuel , LPG and hydrogen gas as substitute fuel. For the experimental work diesel engine was modified to run on base fuel diesel and secondary fuel gas. The experiments were conducted to measure the variation of pressure, ID period at varied conditions of load and different substitution of diesel with LPG and hydrogen fuel with and without EGR at rated speed. For the comparative study, the experimental result of ID were compared and contrasted with Hadenberge-Hase equation for the diesel engine and DFD diesel. Keywords: Dual-fuel,Dual fuel compression ignition diesel engine, Alternative fuel, Ignition delay, Exhaust gas recirculation. 1.Introduction In conventional diesel engines, overall just around 82% fuel burns completely. When gaseous fuel like H2 or LPG inducted in the dual fuel diesel engine by intake manifold, 98% of fuel can be burnt. It is starting at now comprehended that emissions issues like are PM,CO and NOX are, as it were, associated with the diesel engine. By using gaseous fuel like H2,LPG or mixture of H2 and LPG, pollution can be reduced [1]. Saket verma et al. [2] experimented on dual-fuel diesel engine using jatropha as a biodiesel and hydrogen gas as secondary fuel. They were used up to 80.7% and 24.5% of hydrogen (by energy basis) in the DFD engine at high and low loads conditions.Brarake thermal efficiency was increased and exhaust emissions like CO,NOx smoke were decreases as compared to parent diesel engine.Exhaust emission NOx was reduced with addition of EGR in the DF with bio-diesel as primary source of fuel and hydrogen as substitute fuel.Utilisation of hydrogen improves at the comparable brake thermal efficieny and NOx emissions [2]. S.K Karthica et al. [3] have experimented on DFD single cylinder diesel engine at constant speed to study the effective utilization of madhuca longifolia oil (ML) in a diesel engine.Experimental work were done by utilising primary fuel hydrogen.Hydrogen was inducted in the engine with air by the help of intake manifold where as ML was injected directly into the engine cylinder for ignition source. They were claimed that the performance of DFD engine increased from 25% to 28% with ML used as pilot fuel and hydrogen as base fuel for diesel engine. However,they were facing the knocking in the DFD engine when hydrogen used as base fuel and as a result brake thermal efiiciency decreases.In their expriment, they used water injection to increase the knocking limit so that more percentage of ML can be replaced. Further they claimed that BTE exhuast gas emissions were increases upto 18% to 76% with 5% of water addition along with hydrogen fuel. Pavlos Dimitriou et al.[4] were tested hydrogen gas under different conditions of load on a HD DFD engine.They used different hydrogen energy share ration to substitute diesel fuel under different conditions such as diesel injection pressure,EGR and injection pattern to compared the performance and exhaust emissions of dual fuel diesel engine with parent diesel engine.Engine operation was smooth over 98% use of hydrogen on the energy basis.Further it was observed that 90% reduction in NOx and carbon monoxide while soot emissions was reduced upto 85% compared to the base diesel engine. Appeared differently concerning natural gas LPG has the advantage of low-pressure storage, straightforwardness of transportation and more secure managing. Natural gas liquids (NGL), available in different gas fields in India, are a potential wellspring of hydrocarbons from which LPG can be conveyed locally. LPG can be use as the substitute fuel for diesel fuel in the DFD engines and a choice fuel with diesel for CI engines in DF operation [5]. The usage of liquid petroleum gas (LPG), as an alternative fuel, is a promising course of action. The higher auto-ignition temperature, higher calorific value, and likewise, easy mobility make LPG a good alternative fuel for diesel replacement [6]. The reasonably high auto-ignition temperature of LPG is used, allowing the