Impact of LPG Composition on Performance, Emissions and Combustion Characteristics of a Spark-ignited CFR Engine
2022-01-0564
03/29/2022
- Event
- Content
- Research on alternative fuels has made significant progress as demands for cleaner and efficient engine operation intensifies. Liquefied petroleum gas (LPG) can offer a potential alternative fuel route in the Diesel fuel dominated heavy-duty transportation sector due to its low cost, high anti-knock limit relative to gasoline, and reduced emission levels. In this work, experimental investigations are performed to study the effects of LPG compositions on performance, emissions, and combustion behavior of a cooperative fuel research (CFR) engine under stoichiometric conditions. Four LPG blends (chemically pure propane, a representative US blend, HD5, and a representative European blend) representing the present LPG market are chosen. The impact of fuel composition is studied under different compression ratios (CR) ranging from 7:1 to 10:1 with one-unit increments. The results show that fuel composition has minimal effect on engine efficiency over the CR range. Engine-out emissions are substantially affected by fuel compositions with the representative European blend indicating higher unburned hydrocarbon (UHC) emissions particularly at higher CRs. The representative US blend emits lower CO2 emissions across all CRs. With the increase of CR, end-gas autoignition intensifies for all blends and the European blend demonstrates higher knock intensity due to the presence of more reactive fuel components.
- Citation
- Fosudo, T., Kar, T., Marchese, A., Windom, B. et al., "Impact of LPG Composition on Performance, Emissions and Combustion Characteristics of a Spark-ignited CFR Engine," SAE Technical Paper 2022-01-0564, 2022, .