(19)
(11) EP 2 053 711 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
30.05.2012 Bulletin 2012/22

(43) Date of publication A2:
29.04.2009 Bulletin 2009/18

(21) Application number: 08466027.3

(22) Date of filing: 22.10.2008
(51) International Patent Classification (IPC): 
H01T 13/46(2006.01)
 H01T 13/32(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA MK RS

(30) Priority: 23.10.2007 CZ 20070738

(71) Applicant: Technicka Univerzita V Liberci
461 17 Liberec 1 (CZ)

(72) Inventors:
  • Beroun, Stanislav
    460 05 Liberec (CZ)
  • Blazek, Josef
    463 34 Hradek nad Nisou (CZ)

(74) Representative: Musil, Dobroslav 
Cejl 38
602 00 Brno
602 00 Brno (CZ)

   


(54) Spark plug


(57) The spark plug, especially for the spark ignition piston engine, comprising the center electrode of spark-gap and the shell forming the second electrode of spark-gap and provided with means for connection of the spark plug to dead space of cylinder in combustion engine, while inside the shell the ignition chamber is performed, whose face adjacent to the dead space of the cylinder being respective to the spark plug comprises at least one connecting orifice. The center electrode is passing through the space of ignition chamber and it finishes in the connecting orifice in the face of ignition chamber, while between surface of circumference of the connecting orifice and surface of circumference of the end of center electrode there is the gap.







Search report