Patent ID: 8847494
Filing Date: 2014-09-30
Classification: F02P,H01T

Abstract:
1. An ignition system for a plasma jet ignition plug comprising: a plasma jet ignition plug having a center electrode, a ground electrode, and a cavity surrounding at least a portion of a gap formed between the center electrode and the ground electrode to form a discharge space; a voltage application section for applying voltage across the gap, wherein the voltage is supplied to the gap solely by said voltage application section; a plug cap unit having an electrical conductor electrically connecting the plasma jet ignition plug and a plug cord to which voltage from the voltage application section is applied and that is connected to the plasma jet ignition plug; a capacitance section having a capacitance and provided in parallel with the plasma jet ignition plug, said capacitance section comprising: a shield formed of a conductive material, said shield is grounded and disposed around the unit built-in section and the electrical conductor, wherein the shield and the electrical conductor have a capacitance of 25 pF or less between the shield and the electrical conductor.