Search Results

The original Table 2 includes incorrect data under the "Primary Energy" column for "multi-strike", "continuous" and "plasma" system types.

Dilution of a stoichiometric spark ignited (SI) charge with exhaust gas recirculation (EGR) has been shown to improve thermal efficiency and fuel consumption through improved combustion phasing and heat transfer losses at the knock limit in conjunction with a reduction of heat transfer losses and pumping losses at throttled conditions. However, combustion stability can be adversely affected by EGR dilution. The degradation in combustion stability can be mitigated by selecting an ignition system that can successfully propagate a self-sustaining flame kernel in the presence of a high concentration of diluent and increase the apparent burn rate. This investigation examines improvements to EGR dilution tolerance and brake specific fuel consumption (BSFC) for multiple alternative ignition systems at various engine operating points while maintaining a stoichiometric air-fuel ratio.