Patent ID: 8061321
Filing Date: 2011-11-22
Classification: F02P,H01T

Abstract:
1. An ignition device, comprising: a center electrode having an elongated shaft shape; an insulator having a tubular shape, the insulator extending around and below the center electrode; and a ground electrode extending around and below the insulator and having a first open portion of diameter D the center electrode, the insulators and the ground electrode defining a discharge space of the ignition device; the discharge space, in operation, being provided with high voltage from a discharge power source and high current from a plasma energy supply power source to form plasma having high temperature and high pressure in the discharge space, the plasma being ejected into a combustion chamber to ignite a combustible therewithin; wherein a rotation supply mechanism having a second open portion is provided at said apical end below said first open portion to provide a rotation supply space defined by an inner tubular peripheral oval face which, in operation, supplies rotational force to the plasma ejected from the discharge space in a direction from the periphery towards a center of the plasma; and 1.0×D