THROTTLE CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE

摘要

<P>PROBLEM TO BE SOLVED: To prevent deviation between a target throttle opening and an actual throttle opening or between a required engine flow rate and an actual flow rate, in a throttle control device of an internal combustion engine, in which a throttle motor is controlled such that an opening of a throttle valve is the same with its target opening. Ž<P>SOLUTION: A throttle target opening lower limit guard value is calculated based on a throttle command voltage lower limit guard value which is obtained by making the throttle valve abut in a full closing position. A lower limit of the throttle target opening is regulated using the throttle target opening lower limit guard value. A required engine flow rate lower limit guard value is calculated based on the throttle command voltage lower limit guard value (a throttle target opening lower limit guard value). A lower limit of the required engine flow rate is regulated using the required engine flow rate lower limit guard value. Such a guard process allows the gap made between the target throttle opening and actual throttle opening or between the required engine flow rate and actual flow rate to be eliminated. The guard process can also prevent an erroneous learning of the target throttle opening or the required engine flow rate. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž