Patent ID: 7392798
Filing Date: 2008-07-01
Classification: F02P,Y02T

Abstract:
1. An ignition system for an internal combustion engine having a spark plug connected to the secondary coil, the ignition system comprising: an ignition coil having a primary coil and a secondary coil; electric power supply means for supplying primary current to the primary coil at a prescribed voltage; switching means for switching on and off the primary current at controlled timings to discharge the electric energy from the secondary coil to the spark plug; engine condition detecting means for detecting a signal relating to flow speed of air-fuel-mixture gas in the engine; ignition control means for controlling the switching means to provide multiple ignition sparks in a predetermined ignition period at the spark plug; wherein the ignition control means controls the switching means to maintain each of the ignition sparks according to the signal relating to the flow speed of air-fuel-mixture gas in the engine.