Тюменский индустриальный институт им.Ленинского комсомола
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FIELD: production of spark plugs used in combustion engines ignition systems. SUBSTANCE: combustion engine spark plug has body with chamber provided with output hole, fixed in body insulator with central electrode and side electrode linked with body. Chamber has ring-type bulge dividing it for two in series connected cavity. Spark interval formed by electrodes is located outside body and is distinguished for the fact, that to increase efficiency of spark plug ring-type bulge is made in the form of nozzle with several grooves in its wall. 2. Spark plug described in point 1 is distinguished for the fact, that grooves in nozzle wall are made inclined. EFFECT: increased spark plug effectiveness, intensified engine fuel burning process, decreased toxicity of exhaust gasses.