Fuel injection control system designed to eliminate overlap between multiple fuel injection events

A fuel injection control apparatus for a multi-cylinder internal combustion engine mounted in a vehicle comprising:

• injectors each of which, when energized, works to spray fuel into one of cylinders of an engine of a vehicle;
• an operating condition determining circuit working to determine preselected operating conditions of the engine and the vehicle;
• and
• a controller working to schedule execution of a sequence of multiple injections of the fuel into each of the cylinders through control of a corresponding one of said injectors in each operating cycle of the engine based on the operating conditions, as determined by said operating condition determining circuit, said controller determining whether an overlapping condition where events of any two of the injections scheduled to be executed in any two of the cylinders overlap in time with each other is met or not, when the overlapping condition is determined to be met, said controller determining which of the two of the injections overlapping each other should be rescheduled based on the operating condition of the vehicle, as determined by said operating condition determining circuit, and rescheduling execution of one of the two of the injections, as determined to be rescheduled, so as to eliminate overlap with any of the events of the injections;
• wherein said rescheduling execution of one of the two of the injections comprises time-shifting of the one of the two of the injections, as determined to be rescheduled, so as to eliminate the overlap with any of the events of the injections.

A fuel injection control apparatus for a multi-cylinder internal combustion engine mounted in a vehicle, the apparatus comprising:

• fuel injectors each of which spray fuel into a respective one of cylinders of an engine of a vehicle;
• an operating condition determining circuit which determines preselected operating conditions of the engine and the vehicle;
• and
• a controller which schedules execution of a sequence of multiple injections of the fuel into each of the cylinders through control of a corresponding one of said injectors in each operating cycle of the engine based on the operating conditions, as determined by said operating condition determining circuit,
• wherein said controller determines whether an overlapping condition where events of any two of the injections scheduled to be executed in any two of the cylinders overlap in time with each other is met or not, when the overlapping condition is determined to be met, said controller determines a priority of which of the two of the injections overlapping each other should be rescheduled based on the operating condition of the vehicle, each of the two overlapping injections being capable of being re-scheduled, as determined by said operating condition determining circuit, and reschedules execution of one of the two of the injections, as determined to be rescheduled, so as to eliminate overlap with any of the events of the injections.