FIELD: electric engineering, in particular, electric ignition systems for internal combustion engines, possible use in cars, motorbikes, tractors, ships, airplanes, etc.
SUBSTANCE: spark plug for internal combustion engines contains body with detachable discharge nozzle, which has internal circular narrowed section and expanding output section, and central electrode positioned inside the discharge nozzle, end of which is positioned in zone of circular narrowing of discharge nozzle. Discharge nozzle is held on the body by threaded connection.
EFFECT: increased reliability and operation characteristics of spark plug.
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