| EXPERIMENTAL STUDIES ON LOW PRESSURE SEMI-DIRECT FUEL INJECTION IN A TWO STROKE SPARK IGNITION ENGINE |
| M. LOGANATHAN1, A. RAMESH2 |
1Annamalai University
2Indian Institute of Technology Madras |
|
|
|
|
|
| ABSTRACT |
|
In this work a two-stroke scooter engine was modified to work with semi-direct injection of gasoline at a pressure of 8 bar from an injector in the cylinder barrel pointed toward the cylinder head. The influence of injection timing, injection pressure, spark plug location and air-fuel ratio, on performance, emissions and combustion characteristics has been investigated. In addition, a comparison has been made with manifold injection of gasoline on the same engine at a given speed and various outputs. A significant reduction in HC emissions and fuel consumption with no adverse effects on NOx emissions and combustion stability was observed. A small drop in power and increase in CO emission were observed disadvantages of the new injection system. Injection timing was found to be the most important factor and a balance between reduction in shortcircuited fuel by late injection, and time for mixture preparation by advancing the injection, was found to be essential. |
| Key Words:
Two stroke engines, Semi-direct injection, Emission control, Fuel Injection |
|
Preview 
Full text via DOI 
Download Citation
Print
