A study on the rapid bulk combustion of premixture using the radical seeding

Diagnosis of the Combustion Characteristics of Spark Ignition Engine with Compressed Natural Gas(CNG) Injection Type

“…For example, Kang performed experimental study on a CNG engines operating with direct and indirect injection of CNG and found that the torque is increased by 10% and the emission is decreased by a small amount for direct injection CNG engine compared to indirect injection 6) . Prior to this report, a series of studies were carried out to obtain basic data for the technology development of the CNG engine [8][9][10][11] .…”

“…The sub-chamber, which was hemispherical in shape, had a volume of about 3 cc and eight holes of 1.5 mm diameter. Those values, however, were not fixed because they were experimental parameters of the studies using a constant volume combustor [8][9][10] or a test engine 11) .…”

“…In these reports, the radicals in the spouted gas were measured by an experimental method. This combustion method is called radical ignition [8][9][10][11] . In contrast, the injection duration of CNG is proportional to the displacement volume of the engines.…”