GAS-TURBINE ENGINE SPARK PLUG Russian patent published in 2003 - IPC

FIELD: gas-turbine engine ignition system. SUBSTANCE: spark plug has body accommodating central electrode and casing that encloses mentioned body to form cooling space and is provided with inlet and outlet holes and deflector with outlet hole; deflector is secured to casing butt-end by means of barrier made in the form of open ring following casing contour; it forms slit channel above electrode end; outlet hole of cooling space is made on casing butt-end between electrode and barrier section disposed opposite to its open part; outlet hole of deflector communicates with slit channel. Deflector is made in the form of disk with notch provided on open side of barrier and its outlet hole communicates with notch. Deflector thickness amounts to 0.45. . . 0.95 of slit channel height. Deflector surface in slit channel has plurality of projections forming clearance together with casing butt-end. Deflector surface projections are made in the form of cylindrical pins whose height is 0.25...0.85 of deflector thickness; volume of projections is 0.0015...0.15 of that of slit channel. EFFECT: enhanced service life and reliability, improved starting characteristics of spark plug due to its effective cooling. 4 cl, 4 dwg