Effect of Ignition energy on performance and emission of CNG fuelled Bi-fuel Engine: Experimental Investigation

Abstract

The research on alternative fuels for internal combustion engine has become essential due
to depletion of petroleum products and its major contribution for pollutants, where Natural gas is one
of the most promising fuel alternatives for the future.Most of the CNG fuelled vehicles in India are
aftermarket retrofitted conversions from the existing SI engine vehicles.it is found that power
produced by the CNG engine is 8-14% less compare to Gasoline engine. To increase the
performance of the Bi-fuel engine there are many parameter which can be optimized. One of them is
ignition energy. CNG because of high ignition temperature and low flame speed compare to gasoline
for complete combustion higher ignition energy is required.The objective of this research is to
improve engine performance and emissions of CNG fuelled SI engine by optimize ignition energy.
The Performance and emission both decreased when engine was made to run on CNG instead of
Petrol. By increasing ignition parameter like ignition energy performance of Bi-fuel engine in CNG
mode is increasing. And further decreasing in emission is foundin CNG mode. BSFC found
decreasing, BTE found Increasing, VE found Increasing and HC, CO and CO2found further
decreasing in Bi-fuel engine fuelled with CNG.