BICAMERAL SPARK PLUG OF INTERNAL COMBUSTION ENGINE Russian patent published in 2009 - IPC H01T13/54 

FIELD: mechanical engineering.

SUBSTANCE: invention relates to mechanical engineering field, particularly to devices for inflammation of composite fuel of internal combustion engine. Bicameral spark plug of internal combustion engine, contains body (1), located in the body insulator (2) with bottom (3) and top (4) center cylindrical electrodes. Inner cavity of the body (1) of spark plug is implemented as cylindrical or tapered, transferring into ultimate part of nozzle (5), implemented at one with body of (1) spark plug. Diametre and length of ultimate part of nozzle (5) are selected in the range correspondingly 0.22-0.91 and 0.12-0.49 of maximal diametre of inner cavity of body (1) of spark plug. On stage of inner cylindrical cavity of the body (1) of spark plug it is additionally located linear bushing (6), outfitted by nozzle end (10) and bush implemented of metal (6) separates inner plane (1) of spark plug for two chambers - top (7) and bottom (8), herewith correlation of inner volumes of top chamber (7) and bottom chamber (8) are selected equal to 1:(6-24). Sleeve's (6) conical surface of its bottom external part is located on cone-shaped stage of inner surface of body cavity (1) of plug, and on conical surface of top inner part of sleeve (6) it is located insulator (2) with central electrode (3). Inner cavity of sleeve (6) is implemented as cylindrical or tapered, transferring into critical condition of nozzle end (10) of the top chamber (7) of plug with located in it central electrode (3) of the diametre 1.5-4 mm with formation of clearance between central electrode and critical section equal to 0.2-2.5 mm. Length of projecting from the isolator (2) part of the bottom central cylindrical electrode (3) is selected in the range of 0.18-3.22 maximal diametre of inner cavity of sleeve (6), and butt of the bottom central cylindrical electrode (3) is located in the area of critical section nozzle end (10) of sleeve (6) or projecting from it into the side of nozzle end section (10). Surface of located in the top chamber (10) plugs of insulator part (2) is implemented as tapered or cylindrical, on step junctions between sleeve (6) and body (1) of plug, and also between sleeve (6) and insulator (2) are additionally located implemented from copper or its alloys tapered disks (9).

EFFECT: effectiveness increase of impact to working mixture, increasing of capacity and stability of electrical discharge, achieving of high rate and reliability of initiation of combustion, and also increasing of operation working life at simultaneous reduction of exhaust toxicity and level increasing of ecological compatibility level.

4 cl, 1 dwg