Patent ID: 6401684
Filing Date: 2002-06-11
Classification: F01L

Abstract:
An engine system comprising:electromagnetically operated intake and exhaust valves; a spark plug; a primary ignition coil; a secondary ignition coil generating an induction voltage according to a current-stopping operation to said primary ignition coil following a current-flowing operation, said secondary ignition coil outputting the induction voltage to said spark plug; and a control unit arranged to decide whether each of intake and exhaust valves is put in an abnormal condition, to close a normal valve of said intake and exhaust valves when one of said intake and exhaust valves is put in the abnormal condition, and to stop the current-flowing to said primary ignition coil when one of said intake and exhaust valves is put in the abnormal condition and when the primary ignition coil does not start the current-following operation.