205 Ignition Characteristics Of Microwave-enhanced Laser Ignition

Laser ignition provides an innovative method to improve internal combustion engine performance in diluted conditions. It is well known that ignition under highly diluted conditions can cause an initial flame kernel instability, and strong cycle-to-cycle fluctuations. In order to achieve a stable combustion and high thermal efficiency, enlarging initial plasma size and plasma lifetime was proved to be one of effective procedures in the laser ignition. Microwave-enhanced laser ignition techniques have been proposed and the effects of microwave input pulse duty ratio on minimum laser ignition energy have been experimentally investigated in a constant volume combustion vessel with methane/air mixture.