Optimization of diesel engine parameters using Taguchi method and design of evolution

the objective of this work is to optimize the control parameters of the direct injection (di) single cylinder diesel engine with respect to nox (oxides of nitrogen) and fuel emissions through experimental investigations and taguchi method. a single cylinder 5.2 kw diesel engine was selected for this experiment. five parameters such as clearance volume, valve opening pressure, nozzle-hole diameter, static injection timing and load torque were varied at four levels and the responses such as nox emissions and fuel economy were recorded. the optimum values of the response variables could be predicted using s/n ratio and optimum combination of control parameters were specified. results of confirmation tests showed good agreement with predicted results. thus the relationship between the diesel engine operating parameters with nox and b.s.f.c (brake specific fuel consumption) could be understood using taguchi method of experimental design.