Optimization of Multiple Injection Strategy in Modified Common Rail Direct Injection Diesel Engine Powered with Palm Oil Methyl Ester

Mahantesh Shivashimpi,Nagaraj Banapurmath,Sidramappa Alur,Uday Kapale

doi:10.11648/j.ijctc.20190701.20

Mahantesh Shivashimpi, Nagaraj Banapurmath + Show 2 more

Open Access

https://doi.org/10.11648/j.ijctc.20190701.20

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Abstract

In this investigation, the common rail direct injection (CRDI) single cylinder four stroke diesel engine has made to modify in terms of toroidal reentrant combustion chamber (TRCC) shape and 7 holes CRDI nozzle injector. The current experimental study objective is to optimization of multiple injection strategy (MIS) in modified CRDI diesel engine powered with palm oil methyl ester (POME) B100 and diesel fuels. In the first phase of work, experiment results showed that slightly improved in brake thermal efficiency (BTE) and reduced emissions except oxides of nitrogen (NO<sub>x</sub>) for POME fuelled engine operates under optimized MIS, fuel injection timing (IT) of -10° before top dead center (BTDC) and 600 bar injection pressure (IOP) in modified CRDI diesel engine. In the second phase of work, the performance of modified CRDI diesel engine is improved by increasing IOP from 600 bar to 900 bar at same MIS and fuel IT. The second phase of experiment results showed that percentage of increase in BTE by 2.47%, peak pressure (PP) by 13.69%, heat release rate (HRR) by 17.64%, NO<sub>X</sub> by 11.70% and percentage of decreased in ignition delay (ID) by 29.62%, combustion duration (CD) by 13.79%, unburnt hydrocarbon (UBHC) by 19.04%, carbon monoxide (CO) by 14.28%, smoke level by 20.93% as compared to first phase of work in modified CRDI diesel engine fuelled with POME.

Highlights

The usage of biodiesel fuel blends in existed diesel engine minimize pollutants, but true efficiency of the diesel engine decreases due to insufficient air fuel mixture and swirl
The experiments are conducted on modified common rail direct injection (CRDI) diesel engine operated with the diesel and palm oil methyl ester (POME) fuels with two multiple injection strategy (MIS) combinations
Effect of brake thermal efficiency (BTE) with injection timing (IT) on Multiple Injection Strategy The figure 2 showed that effect of IT on BTE for MIS and SIS for both POME and diesel fuels in modified CRDI engine

Summary

Introduction

The usage of biodiesel fuel blends in existed diesel engine minimize pollutants, but true efficiency of the diesel engine decreases due to insufficient air fuel mixture and swirl. The drawback of usage of the fossil fuel in engine is emits more pollutants and affect on living beings. It is considered globally very serious matter to control emissions. The experts conducted experiments with various injection strategies in diesel engine [6, 7]. The Transesterification process is one of very common method to reduce viscosity of biodiesel [8]. The biodiesel derived from transesterification method is Mahantesh Shivashimpi et al.: Optimization of Multiple Injection Strategy in Modified Common

Methods

Results

Conclusion