A Comparison of Spray-Guided Stratified-Charge Combustion Performance with Outwardly-Opening Piezo and Multi-Hole Solenoid Injectors 2011-01-1217
This investigation was aimed at measuring the relative performance of two spray-guided, single-cylinder, spark-ignited direct-injected (SIDI) engine combustion system designs. The first utilizes an outwardly-opening poppet, piezo-actuated injector, and the second a conventional, solenoid operated, inwardly-opening multi-hole injector. The single-cylinder engine tests were limited to steady state, warmed-up conditions. The comparison showed that these two spray-guided combustion systems with two very different sprays had surprisingly close results and only differed in some details. Combustion stability and smoke emissions of the systems are comparable to each other over most of the load range. Over a simulated Federal Test Procedure (FTP) cycle, the multi-hole system had 15% lower hydrocarbon and 18% lower carbon monoxide emissions. Most significantly, the spray guided system with the multi-hole spray ended up having 3.0% lower fuel consumption than the piezo system over the simulated FTP cycle.
Citation: Smith, J., Szekely Jr, G., Solomon, A., and Parrish, S., "A Comparison of Spray-Guided Stratified-Charge Combustion Performance with Outwardly-Opening Piezo and Multi-Hole Solenoid Injectors," SAE Int. J. Engines 4(1):1481-1497, 2011, https://doi.org/10.4271/2011-01-1217. Download Citation
James Smith, Gerald Szekely Jr, Arun Solomon, Scott Parrish
US Environmental Protection Agency, General Motors Company
SAE 2011 World Congress & Exhibition
SAE International Journal of Engines-V120-3, SAE International Journal of Engines-V120-3EJ