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.
Optimization of Diesel Engine Parameters for Performance, Combustion and Emission Parameters using Taguchi and Grey Relational Analysis
Design and operating parameters of diesel engine were optimized in the present work with 9 respect to performance, combustion and emission parameters. The goal is to reduce brake 10 specific fuel consumption (BSFC), exhaust gas temperature (EGT), ignition delay (ID), 11 emissions (CO, NOx, HC) and to increase peak pressure (PP), brake thermal eﬀiciency 12 (BTHE), heat release (HR) simultaneously with least number of experimental runs. The objective was accomplished through experimental investigations, design of experiments, 14 Taguchi method and Grey Relational Analysis. Four parameters viz. injection timing (IJT), 15 injection pressure (IP), compression ratio (CR) and load were varied at four levels and the 16 (nine) responses were recorded. Taguchi approach was applied to individual response and observed that optimal factor settings for various responses are different. Abstract-Design and operating parameters of diesel engine were optimized in the present work with respect to 25 performance, combustion and emission parameters. The goal is to reduce brake specific fuel consumption (BSFC), 26 exhaust gas temperature (EGT), ignition delay (ID), emissions (CO, NOx, HC) and to increase peak pressure 27 (PP), brake thermal eﬀiciency (BTHE), heat release (HR) simultaneously with least number of experimental runs. 28 The objective was accomplished through experimental investigations, design of experiments, Taguchi method and 29 Grey Relational Analysis. Four parameters viz. injection timing (IJT), injection pressure (IP), compression ratio 30 (CR) and load were varied at four levels and the (nine) responses were recorded. Taguchi approach was applied to 31 individual response and observed that optimal factor settings for various responses are their relative significance, and the sum of weighting factors must be equal to unity [22]. In the present work weighting factor 0.2 is assigned for brake thermal eﬀiciency and 0.1 for all other responses. This study uses L 16 orthogonal array of Taguchi method mentioned in Table 4 to find out best Injection 219 timing, injection pressure, compression ratio and load setting for diesel engine. At four levels of each factor, the 220 responses viz. BSFC, brake thermal eﬀiciency, peak pressure, and heat release, exhaust gas temperature, ignition 221 delay, CO, NO X and HC are determined.
NOISE, EMISSIONS AND PERFORMANCE OF THE DIESEL ENGINE-A COMPARISON BETWEEN DI AND IDI COMBUSTION SYSTEMS
A direct as well as an indirect injection system have been studied in regard to noise, exhaust emissions and fuel consumption on a V-10 diesel engine. The dependency of the sound pressure levels on engine speed, engine load and injection timing is described for both combustion systems. The noise reduction achieved by optimisation of injection timing is shown in relation to the respective changes in exhaust and smoke emission output and fuel consumption.