Performance and Emission Characteristics Analysis on Direct Injection Gasoline Engine

K.Kumaravel; B.Premanand; C.G.Saravanan

Volume : III, Issue : VIII, August - 2014

Performance and Emission Characteristics Analysis on Direct Injection Gasoline Engine

K. Kumaravel, B. Premanand, C. G. Saravanan

Abstract :

Gasoline direct injection (GDI) engines have become popular due to their inherent potential for reduction of exhaust emissions and fuel consumption to meet increasingly stringent environmental standards. These engines require high-pressure fuel injection in order to improve the fuel atomization process and accelerate mixture preparation. The conventional diesel engine was modified to GDI engine by increasing the clearance volume. The compression ratio (CR) 17:1 of the diesel engine was modified to CR 9:1. By the use of GDI engine we can able to reduce the losses in carburetor like evaporation. Also it help to avoid fuel wall film in the manifold improved accuracy of air/fuel ratio, CO2 emission also reduce, increased performance and volumetric efficiency due to cooling air charge , better cold start performance and better drive comfort . A set of test was done at different spark angles (16�,18� and 20�) and injection start angle (90�,120� and 150�) respectively keeping the particular constant like air - fuel ratio 14:67 , water flow rate (2L/min) and speed at 1500 rpm . During the test exhaust gas released like CO, HC, NOx , CO2 and O2 at different load and degree of spark angle advance and SOI angle has been determined The exhaust gases decreases in every gases like HC, CO, NOx except O2 which increases load and ake power irrespective for all different spark angles and SOI of ATDC. According to test condition and experiment set up spark angle of 20� BTDC and 150� ATDC SOI are appropriatefor obtaining better performance and exhaust gas emission.