METHOD AND APPARATUS FOR CONTROLLING FUEL INJECTION OF AN INTERNAL COMBUSTION ENGINE

摘要

A system is provided for an internal combustion engine including a fuel supply system that supplies pressurized fuel to a fuel injector, and a pressure sensor that detects a fuel pressure inside the fuel supply system. The system includes an ECU. The ECU is configured to detect characteristics of the fuel injector based on the fuel pressure detected by the pressure sensor, execute multi-stage injection in which fuel is injected from the fuel injector a plurality of times in one combustion cycle, and detects the operating characteristics associated with each injection of the multi-stage injection. The ECU is configured to execute a first combustion cycle in which the operating characteristics associated with at least one particular injections other than an initial-stage injection are not detected, and a second combustion cycle in which the operating characteristics associated with said at least one particular injections are detected.