This invention concerns an ignition plug for internal combustion engines and a process for igniting gas mixture by the use thereof, which functionally speaking are characterized by utilizing the expansion of initial gas combustion following the formation of primary ignited gasses in a spark gap for the formation of secondary ignited gasses and the completion of combustion over the entire space of the ignition plug. For this, either the inside surface of a ground electrode opposed to a center electrode of the side surface of a center electrode opposed to a ground electrode is made flat in principle in order to drive primary ignited gasses from a spark gap to an ignition groove, which is to be provided to on the top of a center electrode or the other side of a ground electrode as to a center electrode, by the use of the initial combustion explosion in the spark gap so as to accelerate the growth and the multiplication of the ignited gasses there and lead them to complete instantaneous combustion.
A spark plug for an internal combustion engine having one or more electrode diagonally projecting from a central electrode into a V-shaped grounding window which is cut into the skirt of the spark plug body. The novel electrode suspended in the grounding window provides broader spark dispersion, through a wider arching area, and greatly improved spark plug life.
There is disclosed a spark plug which can maintain a low spark voltage for a long period of time even if a noble metal tip is used in a small amount. A discharge gap is formed between a central electrode and an earth electrode. The noble metal tip is formed on that end face of the central electrode facing the earth electrode. A cross-shaped groove is formed in that end face of the noble metal tip joined to the central electrode. The cross-shaped groove is exposed when the noble metal tip is consumed by a discharge developing in the discharge gap.
The present invention provides an improved spark plug and electrode arrangement therefor. A central electrode has a sparking end adjacently positioned to and mated with a spark-receiving end of an outer electrode. At least one of the electrode ends has a protrusion extending towards the other electrode, and the other electrode has a geometrically mated indentation. A relatively uniform spark gap having increased surface area is provided therebetween. Hemispherical or rounded and conical protrusions and mated indentations are preferred embodiments of the present invention. The present spark plug electrode arrangement provides increased area sparks, regulates sparks under varied conditions and decreases incidence of carbon build up.
Provided is a spark plug that includes a central electrode having a proximal end and a distal end and a cap having a central portion and plural projections extending radially from the central portion. The cap has a proximal side and a distal side, and the proximal side of the cap is attached to the distal end of the central electrode. The cap is electrically conductive, having a first electrical conductivity. A central portion of the cap defines a hole and has a thickness in a location of the hole, and the central electrode extends into the hole of the cap but terminates prior to the distal side of the cap. A filler material, which may have been deposited as a fusion medium, is disposed within a portion of the hole that is not occupied by the central electrode, with the filler material having a second electrical conductivity that is lower than the first electrical conductivity.
A grounding electrode 20 is electrically grounds, and a center electrode 10 to which high voltage pulse is applied that an end of the grounding electrode 20 and an end of the center electrode 10 are disposed closely. The grounding electrode 20 is branched into a main grounding electrode 21 and an auxiliary grounding electrode 30. An end 25 of the main grounding electrode 21 and an end 36 of the auxiliary grounding electrode 30 are disposed close to an end 11 of the center electrode. An inductor section 32 that counterelectromotive force is generated according to a variation amount of flowing current is integrally provided between a portion of the auxiliary grounding electrode 30 branched from the grounding electrode 20 and the end 36 of the auxiliary grounding electrode 30.
