Patent Number: 6,305,929

Title: Laser-induced ignition system using a cavity

Abstract: An apparatus which can confine almost entire available energy in thevicinity of ignition point during a laser-induced ignition process isproposed. Multiple reflection by a cavity surface when a small diameterlaser beam is directed into the cavity is utilized in laser ignition.Shadowgraphs of the early stages of the combustion process for quiescentmethane/air mixtures show that a hot gas jet emerges from the cavity.During subsequent flame propagation, both similarities with and differencefrom conventional spark ignition processes are observed, depending on thecavity size and the concentration of mixtures. With laser cavity ignition,the chamber pressure increases relatively rapidly and higher maximumpressure can be achieved. As a result, the combustion duration for lasercavity ignition is decreased relative to laser-induced spark ignition.

Inventors: Chung; Suk Ho (Seoul 151-742, KR), Morsy; Mohamed Hassan (Suez, EG), Ko; Young Sung (Seoul, KR)


International Classification:

Expiration Date: 10/23/2013