SPARKING PLUG Russian patent published in 1994 - IPC

FIELD: engine making. SUBSTANCE: in process of operation of engine its body 1 and parts of central electrode are heated to different temperatures, so they lengthen differently. Body 1 lengthens to bigger value and pulls electrode 12 downwards together with operational insulator 5 pressed to body with spring 9. Thanks to presence of stretching flexible element 13 contact 11 of central electrode 12 remains pressed with spring 9 via insulator 6 to contact 4 of current-carrying rod 3. Locating axial force of deformation of flexible element 13 is less than locating effort of spring 9. EFFECT: enhanced reliability and prolonged service life of sparking plugs. 1 dwg