INTAKE AIR QUANTITY COMPUTING DEVICE AND INTAKE AIR PRESSURE COMPUTING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an intake air quantity computing device capable of enhancing accuracy in computing an intake air quantity, and to provide an intake air pressure computing device capable of enhancing accuracy in computing an intake air pipe pressure. SOLUTION: An intake air pipe pressure P0 is computed from the sum of an air quantity QA0 passing through a throttle which is computed based on at least a throttle opening and a purge flow QP flowing in an intake air pipe from a purge passage, and an intake air pipe pressure P3 is computed from an intake air quantity QA based on the output of an air flow meter. An intake air quantity sucked into an engine is computed based on those intake air pipe pressure P0 and intake air pipe pressure P3.