INJECTION TIMING LEARNING CONTROL DEVICE AND INJECTION TIMING LEARNING CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To enable an injection timing learning control for improving a combustion stability degree to be easily executed.SOLUTION: An injection timing learning control device of this invention comprises: a storage section for storing a data map about the number of injection stages and injection timing corresponding to an operation state of an internal combustion engine; an operating state detecting section for detecting an operating state of the internal combustion engine; an injection condition setting section for setting the number of injection stages and the injection timing on the basis of the data map according to the detected operating state; a combustion stability degree determination section for determining a combustion stability degree of the internal combustion engine; and a correction amount learning section for correcting the injection timing for injection at a higher stage of preference degree with a correction range corresponding to the rotation frequency of the internal combustion engine and at the same, determining whether or not the combustion stability degree after correction of the injection timing is improved, and storing the learning correction amount in which combustion stability degree is improved in the storage section.SELECTED DRAWING: Figure 2