Extending Lean Operating Limit and Reducing Emissions of Methane Spark-Ignited Engines Using a Microwave-Assisted Spark Plug

Table 1

Engine specifications.

Displacement	0.616 L
Stroke	114.3 mm
Bore	82.8 mm
Connecting rod	254 mm
Number of valves	2
IVO at 0.15 mm lift	−343°CA ATDCcompression
IVC at 0.15 mm lift	−153°CA ATDCcompression
EVO at 0.15 mm lift	148°CA ATDCcompression
EVC at 0.15 mm lift	−353°CA ATDCcompression