Experimental Investigation of a Direct Injection Dual Fuel Diesel-Natural Gas Engine

3985 Words Jul 21st, 2012 16 Pages
A Seminar Report On
EXPERIMENTAL INVESTIGATION OF A DIRECT INJECTION DUAL FUEL DIESEL-NATURAL GAS ENGINE

Presented by JAGADEESH PUTTA ME04B118 S8 ME 27

Department of Mechanical Engineering NATIONAL INSTITUTE OF TECHNOLOGY CALICUT KERALA- 673 601 Winter 2007-08

CERTIFICATE

This is to certify that this seminar report entitled “EXPERIMENTAL INVESTIGATION
OF A DIRECT INJECTION DUAL FUEL DIESEL-NATURAL GAS ENGINE “is a bonafide

record of the seminar presented by JAGADEESH PUTTA, Roll no:ME04B118, during winter semester 2007-08 in partial fulfilment of the requirement for the award of B.Tech degree in Mechanical Engineering by the National Institute of Technology, Calicut.

Faculty In-Charge of Seminar Department of
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The seminar focuses on the study of the effect of compressed natural gas (CNG) and diesel fuel injection pressures, together with the amount of fuel injected during the pilot injection for different operating conditions, on combustion development, engine emission levels and fuel consumption.

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1. INTRODUCTION
Nowadays the internal combustion engines are spread to the extent that they represent the main cause of pollutant production. Nevertheless, it is well known that the stocks of fuels traditionally used in this kind of engines will be able to satisfy the world’s needs for few more decades. This explains the massive research activity, drawn all over the world, addressed to the utilization of innovative fuels and injection concepts in order to either replace the traditional ones or obtain a more efficient and clean combustion. Compared to diesel engines, characterized by a high efficiency but at the same time high levels of articulate, and to premixed charge gasoline engines, characterized by a low efficiency because of knock limitations and pumping losses, lean burn engines can reach a higher efficiency thanks to lower pumping losses and heat transfer. On the contrary, lean mixtures generally imply higher levels of both total unburned hydrocarbons (THC) and carbon monoxide. Nevertheless, mixing the fuel with an increasing quantity of air, flame instability, sometimes leading to misfiring, is observed.

1.1 Methane as an Alternative Fuel Among the
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