Intake air amount computing apparatus and method for the same, and intake pressure computing apparatus and method for the same

摘要

An intake pressure computing apparatus and a method for the same compute an intake pipe pressure P0 based on a sum of a throttle passing air amount QA0 calculated based on at least a throttle opening and a flow of purge air that flows into an intake pipe through a purge passage, or a purge flow rate QP, and compute an intake pipe pressure P3 using an intake air amount QA based on an output from an air flow meter. An intake air amount computing apparatus and a method for the same compute an amount of air drawn into an engine, or an intake air amount, based on the intake pipe pressure P0 and the intake pipe pressure P3.