INJECTION QUANTITY CONTROLLER FOR AN INTERNAL COMBUSTION ENGINE

The present invention performs an injection quantity learning process with only data acquired within a prescribed time. When the number of pieces of accumulated data reaches a prescribed count, a controller determines whether a time difference between when an oldest piece of data was acquired and when a latest piece of data was acquired is less than the prescribed time. When the difference is less than the prescribed time, the controller corrects a command quantity based on the prescribed number of pieces of data. According to this method, when the injection quantity is corrected, old data having been acquired before the prescribed time is discarded and the command quantity is corrected using only the prescribed number of pieces of data having acquired within the prescribed time, thereby enhancing learning accuracy.