Patent ID: 6910458

Claim:
An injection quantity control apparatus for an internal combustion engine comprising: command value calculation means for calculating a command value of an injection quantity based on a command injection quantity, which is set in accordance with an operating condition of the engine and a fuel injection pressure injection; injection quantity control means for controlling a fuel injection quantity supplied into each cylinder of the engine, actuating an injector provided for each of the cylinders, based on the command value of the injection quantity; learning control performing means for performing a learning control to learn a correction amount for each of the cylinders to smooth an engine speed variation between the cylinders; and reflection means for reflecting the correction amount for each of the cylinders to the calculation of the command injection quantity or the command value of the injection quantity; wherein when a predetermined engine operating condition is met, the learning control performing means performs the learning control while a cylinder cut-off control is performed, in which all of the cylinders are uniformly or approximately uniformly divided into K groups and the cylinder cut-off control is performed with the cylinders of a group in the K groups.