STUDY OF PERFORMANCE AND EMISSION CHARACTERISTICS OF FOUR STROKE DTSI ENGINE USING PETROL AND CNG AS FUEL AT DIFFERENT SPEEDS

Author(s): 

Krishna Prasad S1*, Saravanan R2 and Narasimha Bailkeri1

Affiliation(s): 

1Department of Mechanical engineering, NMAM Institute of Technology, Nitte – Research scholar UVCE Bangalore

2Department of mechanical engineering, UVCE, Bengaluru

*Corresponding Author Email: raokrishnap@gmail.com

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

The main aim of this study is to compare experimentally the effect of different speeds on the performance and emission of four stroke digital spark ignition engine using petrol and CNG as fuel so as to optimize the speed which will lead to better performance of the engine. The experiments were conducted at three different speeds, that is 1500 rpm, 2000rpm and 2500 rpm using petrol and CNG. The results showed that the brake thermal efficiency, brake specific fuel consumption and volumetric efficiency was found to be better for 2000 rpm for both petrol and CNG, also CO and UBHC emission were found to be lower for 2000 rpm. But NOX emissions was increased both in petrol as well as CNG for 2000 rpm. Comparing Petrol and CNG, it is found that brake thermal efficiency is better for CNG and volumetric efficiency for better in petrol. With respect to emission parameters, CO, UBHC and NOX emission was lower for CNG for all speeds.