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Issue No:8 Vol.4 |
june -2011 |
ISSN: 0974-5645 |
| RESEARCH ARTICLES |
Viewers & PDF |
| 18. Effect of dual fuel homogenous charge diesel combustion for simultaneous reduction of NOx and smoke –an experimental study. M. Himabindu and N.V. Mahalakshmi. Indian J.Sci.Technol. Vol.4, Issue 6, pp: 681-687. |
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- Abstract
The present work focuses on reducing oxides of nitrogen (NOx) and smoke emissions significantly and simultaneously
without much compromise in efficiency by involving simple and cost-effective in-cylinder modifications i.e.,
Homogeneous Charge Diesel Combustion (HCDC) using dual fuels (mixture of gasoline- diesel (G-D) and gasolinesarasol
(G-S)). The experiments have been carried out on a single-cylinder, four-stroke, direct injection diesel engine
developing 4.4 kW at 1500 rpm. The study had been carried out by fabricating a diesel engine into HCDC mode to
install a port fuel injector at intake manifold to create a homogenous charge. The injection timing and duration of the
premixed charge was electronically controlled for which electronic fuel injection controller was developed. Gasoline
was premixed and port injected before ignition whereas the diesel/sarasol was injected by the conventional injector
directly into the cylinder and tested for various premixed percentages, however 10% and 40% was optimized in case of
lower and upper limits. It was found that the effect of reduction in NOx and smoke with sarasol in HCDC mode is
appreciable than diesel as secondary fuel. With G-S NOx and smoke was reduced by 56.15% and 2.1 BSU
respectively whereas with G-D NOx and smoke was reduced by 51.09% and 1.9 BSU respectively. This significant
reduction in emissions is due to the thermodynamic physical and chemical properties of sarasol 175/360 apart from
HCDC contribution.
- Keywords: HCDC engine, port injection timing, premixed charge, NOx emissions
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