Lean combustion technologies have been investigated to decrease the heat loss of spark
ignition engines. However, as the excess air ratio approaches the lean operation limit, the …

In order to realize the high compression ratio and high dilution combustion toward
improvement in thermal efficiency, the improvement in stability of ignition and initial phase of …

This study set out to experimentally investigate spark ignition and the subsequent early
flame development of lean air–fuel mixtures of A/F= 20–30 under high-velocity flow …

Increasing discharge energies and employing advanced discharge strategies have been
deemed to be effective methods for improving the ignition processes, especially for diluted …

Lean or diluted combustion has been considered as an effective strategy to improve the
thermal efficiency of spark ignition engines. Under lean or diluted conditions, the combustion …

The paper reports on the optical investigation of a multiple spark ignition system carried out
in a closed vessel in inert gas, and in an optical access engine in firing condition. The …

Operation of spark-ignition (SI) engines with high levels of charge dilution through exhaust
gas recirculation (EGR) achieves significant efficiency gains while maintaining …

The paper reports on the experimental analysis of a multiple spark ignition system, carried
out with conventional and optical non intrusive methods. The system features a plug-top …

Low-temperature plasma (LTP) ignition concepts rely on the production of radical and
charged species to speed up the onset of combustion in spark-ignition engines. These …

It is beneficial but challenging to operate spark-ignition engines under highly lean and dilute
conditions. The unstable ignition behavior can result in downgraded combustion …