EFFECT OF INJECTION PRESSURE ON PERFORMANCE AND EMISSIONS OF CNG DIESEL DUAL FUEL ENGINE

• Published in: International journal of engineering science and technology Vol. 6; no. 6; p. 305
• Main Authors: Rao, B Nageswara, Kumar, B Sudheer Prem, Reddy, K Vijaya Kumar
• Format: Journal Article
• Language: English
• Published: 01.06.2014
• Subjects: Diesel; Diesel engines; Diesel fuels; Dual fuel; Emission analysis; Fuels; Injectors; Pilots
• ISSN: 0975-5462; 0975-5462

In this paper, a single-cylinder diesel engine has been converted into a dual-fuel engine to operate with natural gas together with a pilot injection of diesel fuel used to ignite the CNG-air charge. The CNG was inducted into the combustion chamber via intake manifold. The engine, operating in dual-fuel mode, has been tested on a wide range of operating conditions spanning different values of engine load at constant speed at different injector opening pressures for the pilot fuel (diesel). For all the tested operating conditions, the effect of CNG and diesel fuel injection pressure, together with the amount of fuel injected during the pilot injection, were analyzed on the engine performance, in terms of brake thermal efficiency and emission levels. An experimental investigation was carried out to find out the effect of injection pressure on performance and emissions of a diesel engine operated with CNG inducted into the engine. Behavior of the dual fuel engine at 10%, 20%, 30%, 40% and 50% substitution of CNG with respect to diesel was examined and compared them at different injection pressures.