Stoichiometric Compression Ignition (SCI) Engine

Effects of intake oxygen mole fraction on the near-stoichiometric combustion and emission characteristics of a CI (compression ignition) engine

“…However, it is hard to apply the TWC to stoichiometric combustion with acceptable fuel consumption and emissions in CI engines because the CI engine generally has a lean operating condition [23e27]. Especially, Chase et al [27] introduced the concept of SCI (stoichiometric compression ignition) engine with the ability to reduce particulate matter using DPF and they recommended that the conversion efficiency of TWC is needed over 90% in case of the NO x emission. In addition, stoichiometric combustion engine has some challenges for thermal loading, transient control, air system design, and fuel economy.…”

Improving the environmental performance of heavy-duty vehicles and engines: particular technologies

“…Another noticeable front of conventional diesel combustion research is stoichiometric combustion (Lee et al, 2006(Lee et al, , 2007Chase et al, 2007;Neely et al, 2007;Hoffman and Abraham, 2008;Kim et al, 2009;Sung et al, 2009;Solard et al, 2011;Wu et al, 2011;Maiboom and Tauzia, 2012). It operates compression-ignition engines at stoichiometry and uses a Improving the environmental performance of heavy-duty vehicles low-cost high-efficiency three-way catalyst (TWC) to control tailpipe NO x , HC, and CO.…”

Improvements in the performance and pollutant emissions for stoichiometric diesel combustion engines using a two-spray-angle nozzle

“…Chase et al [7] observed a fuel consumption deterioration in stoichiometric diesel operation. They performed engine experiments with a 9 l sixcylinder heavy-duty diesel engine at 2100 r/min and 15.7 bar brake mean effective pressure, and an external EGR system was deactivated.…”

“…Thus, the combustion regime of their study was similar to low-temperature combustion, which exhibits minimal NO x emissions. On the other hand, Sung et al [5] and Chase et al [7] applied throttled diesel combustion without external EGR. Although it was shown that the sacrifice in combustion efficiency is greater and the engine noise becomes greater than in research using a high EGR rate [1,2], it is believed that the higher exhaust temperature of throttled diesel combustion aids activation of a three-way catalyst.…”