Experimental and Numerical Investigation of Engine Performance Parameters with Spark Timing Alteration to Minimize the Vibration (Knock Index).<br/>

Please enable javascript in your browser.

Experimental and Numerical Investigation of Engine Performance Parameters with Spark Timing Alteration to Minimize the Vibration (Knock Index).

771 Viewed

Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 51853 (08)
University: Sharif University of Technology
Department: Mechanical Engineering
Advisor(s): Kazemzadeh Hannani, Siamak
Abstract:
In this thesis, engine performance parameters such as power, torque, fuel consumption and in-cylinder pressure are investigated with considering ignition timing in order to achieve the minimum value of knock index. The implemented methods include engine dynamometer tests and simulating vehicle powertrain in GT- POWER software. Based on the acceptable precision of the GT-POWER model, it can be used to predict the engine performance in other ignition timings. Final results prove that for wide open throttle status altering the ignition timing to reach the minimum possible value impact differently on the engine performance so that in low engine speeds for basic and new ignition timings, a little discrepancy is seen. However, in upper engine speeds this discrepancy increase. It should be note that when only 25 percent of throttle is open, there is insignificant difference between the results of main and altered ignition timings
Keywords:
Internal Combustion Engines ; Spark Timing ; Engine Testing ; GT-Power Software ; Stamping ; Dynamometer

No TOC