Laser ignition apparatus for an internal combustion engine

Details Laser ignition apparatus for an internal combustion engine Laser ignition apparatus for an internal combustion engine

1982-06-01

1983-11-22

Cox, Ronald B.

Internal-combustion engines

Igniters

123143R, F02P 2300

Patent

active

044162260

ABSTRACT:
A laser ignition apparatus includes a laser oscillator which generates at least two successive pulse-shaped laser beams during each compression stroke of the engine. A first pulse-shaped laser beam is generated by a Q switching action of the laser oscillator and thus has a high peak output and a second pulse-shaped laser beam is generated without the Q switching action and has a low peak output but a larger pulse duration than the first laser beam. The first and second pulse-shaped laser beams are guided and directed into the combustion chamber of the engine and the first laser beam of a high energy density causes the breakdown of the air-fuel mixture in the combustion chamber to develop a plasma and the second laser beam further increases the energy of the plasma thereby to ensure the setting fire of the air-fuel mixture.

REFERENCES:
patent: 3280809 (1966-10-01), Issler
patent: 3861371 (1975-01-01), Gamell
patent: 4122816 (1978-10-01), Fitzgerald
patent: 4314530 (1982-02-01), Giacchehi

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