Method of controlling ignition coil

A non-transitory computer-readable recording medium having recorded thereon instructions executed by at least one processor, the instructions, when executed by the at least one processor, causing the at least one processor to:

• receive a first pulse signal and a second pulse signal following the first pulse signal by a delay time;
• charge a first ignition coil when the first pulse signal is on;
• charge a second ignition coil when a predetermined time period elapses from a time point at which the first pulse signal is on;
• discharge the first ignition coil when the first pulse signal is off;
• discharge the second ignition coil after a maintaining time of the first pulse signal from a time point at which the second ignition coil is charged;
• when the second pulse signal is on, discharge the first ignition coil for a dwell time and then discharging the first ignition coil;
• and
• charge the second ignition coil for the dwell time and then discharging the second ignition coil after a predetermined time period elapses from a time point at which the second ignition coil is discharged.

An ignition coil control system, comprising:

• a controller electrically connected to an engine control unit;
• a first switch and a second switch electrically connected to the controller;
• and
• a first ignition coil and a second ignition coil,
• wherein the first ignition coil includes a primary coil and a secondary coil, a first end portion of the primary coil is electrically connected to a battery, and a second end portion of the primary coil is grounded through the first switch, and
• wherein the second ignition coil includes a primary coil and a secondary coil, a first end portion of the primary coil in the second ignition coil is electrically connected to the battery, and a second end portion of the primary coil in the second ignition coil is grounded through the second switch, and
• wherein the controller is configured for:
• receiving a first pulse signal and a second pulse signal following the first pulse signal by a delay time, from the engine control unit;
• charging the first ignition coil by turning on the first switch when the first pulse signal is on;
• charging the second ignition coil by turning on the second switch when a predetermined time period elapses from a time point at which the first pulse signal is on;
• discharging the first ignition coil by turning off the first switch when the first pulse signal is off;
• discharging the second ignition coil by turning off the second switch after a maintaining time of the first pulse signal from a time point at which the second ignition coil is charged;
• when the second pulse signal is on, charging the first ignition coil for a dwell time by turning on the first switch and then discharging the first ignition coil by turning off the first switch;
• and
• charging the second ignition coil for the dwell time by turning on the second switch and then discharging the second ignition coil by turning off the second switch after a predetermined time period elapses from a time point at which the second ignition coil is discharged.