International Journal of Vehicle Structures and Systems

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The present experimental investigation aims at improving the combustion and performance parameters by varying the injection timing. A 3.5 kW single cylinder stationary CI engine equipped with eddy current dynamometer is used in this investigation. The static injection timing is varied using spill method by an advancement and retirement of 2 CAD with respect to standard injection timing of 23 °BTDC. On comparison with the standard injection timing, the brake thermal efficiency, cylinder pressure, rate of heat release, mean gas temperature and rate of pressure rise are found to increase along with a significant decrease in brake specific fuel consumption for an advanced injection timing of 21 °BTDC. Negative improvement is observed with respect to retarded injection timing of 25 °BTDC. Optimum parameters for enhanced engine performance is found to be 21°BTDC injection timing with a 200 bar injection pressure at rated speed.

Keywords

Injection Timing Variation, In-Cylinder Pressure, Net Heat Release, Mean Gas Temperature.
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