Patent ID: 6283104
Filing Date: 2001-09-04
Classification: F02P

Abstract:
An ignition system for an internal combustion engine, comprising an engine control unit for generating an ignition control signal for said internal combustion engine, and an ignition circuit for performing conduction/cutoff of a primary current on a primary side of an ignition coil in accordance with said ignition control signal to thereby generate a high voltage on a secondary side of said ignition coil, whereby conduction/cutoff of the primary current is controlled so as to be performed repeatedly in accordance with said ignition control signal so that the high voltage for ignition is generated twice or more in one combustion stroke of said internal combustion engine, wherein:said ignition system further comprises communication means for detecting said primary current of said ignition coil and making said engine control unit recognize a fact that the primary current reaches a value not smaller than a set value when said communication means detects the fact; andsaid engine control unit is set so that cutoff timing in a second-time et seq. of the repeated conduction/cutoff control of the primary current in one combustion stroke is determined in accordance with the recognition of said fact.