Trade-off characteristic between soot and oxides of nitrogen emission with pre-injected diesel and biodiesel in a SICI-CIDI engine

Abstract

In this work, SICI mode (Split Injection Compression Ignition) was tested, using diesel as a split injected fuel along with the diesel and biodiesel main injection with various split injected ratios of 0.20, 0.40 and 0.60. Re-circulated Exhaust Gas has been used to analyse the variation in performance and emission, with the exhaust gas rate was varied from 10% to 30% to control nitrogen di oxide and nitrous oxide emissions. The experimental results compared with conventional diesel injection was done in the main chamber. It has been established that hydrocarbons, soot emissions, and carbon monoxide increase as per the experiments carried out on a CIDI engine. With up to 20% recirculated exhaust gas, soot emission decreases and increases when recirculated exhaust gas was increased beyond 20%. So, 20% recirculated exhaust gas would be the optimum use for SICI mode (Split Injection Compression Ignition) with a Split Injected ratio of 0.20%. Compared to CIDI mode, brake thermal efficiency has been slightly decreased. Consequential reduction in NOx can be achieved with the SICI combustion mode due to the lean operation.