Abstract
The influence of compression ratio on the characteristics of combustion, emission and performance in a dual fuelled CI engine using bio gas as the pilot fuel have been explored. The experiments were executed at four different CRs, viz. 16.5, 17, 17.5 and 18 under four distinct load settings of engine, viz. 25%, 50%, 75% and 100% respectively. The results from the investigation manifested an overall superior characteristics of combustion, emissions and performance at CR = 18 as compared to the other values. In contrast to the diesel only approach, the dual fuel approach resulted in superior improvement in NO x emissions for all the load settings.
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