Patent ID: 9166381
Filing Date: 2015-10-20
Classification: F02P,H01T

Abstract:
1. An ignition device, comprising: an ignition coil provided with a primary coil and a secondary coil which are magnetically coupled with each other; a spark plug provided with a center electrode and a ground electrode, discharge sparks being generated between the center electrode and the ground electrode by an application of voltage between the center and ground electrodes, the voltage being applied using electric energy responding to magnetic energy stored in the ignition coil; and voltage limiting means for limiting the voltage applied between the electrodes of the spark plug such that the voltage has an absolute value limited below a predetermined voltage limiting value, wherein the voltage limiting value is differentiated from each other in first and second stages, the first stage being defined as a period in which an initial discharge peak ends, the initial discharge peak being initially generated by the electric energy, the second stage being defined as a period after the end of the initial discharge peak, wherein the voltage limiting value in the first stage is lower than the voltage limiting value in the second stage.