Internal combustion engine purge flow rate controlling apparatus and method

摘要

A purge flow rate to be added (a value to be added or subtracted) DQPGC is calculated based on a deviation between a target purge flow rate QPGCMD (the current value) and the purge flow rate QPGC(k-1) that was calculated in the previous control cycle (step S118), and a purge flow rate QPGC (the current value) is calculated by adding (adding or subtracting) the purge flow rate to be added DQPGC which is so calculated to the previous value QPGC(k-1) of the purge flow rate (steps S130 to S132).