Technical Paper
Strategies to Reduce Higher Unburned Hydrocarbon and Carbon Monoxide Emissions in Reactivity Controlled Compression Ignition
2024-04-09
2024-01-2360
One of the significant limitations of reactivity controlled compression ignition (RCCI) is its higher unburned hydrocarbon (HC) and carbon monoxide (CO) emissions compared to conventional diesel combustion. After-treatment control of HC and CO emissions is difficult to achieve in RCCI because of lower exhaust gas temperatures associated with low-temperature combustion (LTC) mode of operation. The present study involves combined experimental and computational fluid dynamic (CFD) investigations to develop the most effective HC and CO control strategy for RCCI. A production light-duty diesel engine is modified to run in RCCI mode by introducing electronic port fuel injection and replacing the mechanical injector with a CRDI system. Experimental data were obtained using diesel as HRF (High-Reactive Fuel) and gasoline as LRF (Low Reactive Fuel). The combustion simulation was performed using the CONVERGE 3D CFD tool.