INTERNAL COMBUSTION ENGINE CONTROL APPARATUS

摘要

An internal combustion engine control apparatus includes: an ignition coil including a primary coil and a secondary coil that are magnetically coupled to each other; a first switch element for turning on and off a current to the primary coil; and a spark plug, for igniting an air-fuel mixture in an internal combustion engine by using a spark discharge caused by switching the first switch element from the ON state to the OFF state. The internal combustion engine control apparatus is configured to: determine occurrence of one of an abnormality in a discharge voltage and a misfire of the spark plug, when the calculated time duration in which a voltage of the primary coil after the switching of the first switch element from the ON state to the OFF state is above a predetermined comparison reference voltage does not fall within an allowable range.

主权项

1. An internal combustion engine control apparatus, comprising:
an ignition coil including a primary coil and a secondary coil that are magnetically coupled to each other; a first switch element for turning on a current to the primary coil when the first switch element is brought into an ON state, and turning off the current to the primary coil when the first switch element is brought into an OFF state; a control computing section for controlling switching between the ON state and the OFF state of the first switch element; and a spark plug, which is to be driven by a current-interruption type ignition circuit, for igniting an air-fuel mixture in an internal combustion engine by using a spark discharge caused by a magnetically induced voltage generated in the secondary coil by switching of the first switch element from the ON state to the OFF state, wherein the control computing section is configured to:
calculate, as a time duration for determination, a time duration in which a voltage of the primary coil after the switching of the first switch element from the ON state to the OFF state is above a predetermined comparison reference voltage; anddetermine occurrence of one of an abnormality in a discharge voltage of the spark plug and a misfire of the spark plug when the calculated time duration for determination does not fall within an allowable range.