Intake air pressure estimating device for internal combustion engine

Abstract

Abstract PURPOSE:To enable precise estimation of an intake air pressure, by a method wherein paremeter determined based on the dynamic physical model of an internal combustion engine is used, and an intake air pressure, being a physical amount equivalent to a load, is calculated as a state variable amount. CONSTITUTION:An intake air pressure calculating means M4 uses parameter set based on the dynamic physical model of an internal combustion engine 1 to calculate an amount, equivalent to a rotation speed detected by a rotation speed detecting means M2, and an intake air pressure, being a physical amount equivalent to the load of the internal combustion engine, from a control amount calculated by a control amount calculating means M3. This constitution enables precise estimation of an intake air pressure, equivalent to the loed of the internal combustion engine M1, without mounting a detecting means for exclusive use, end further improves response and follow-up property in feedback control of the internal combustion engine.

Inventors

• 👤 Akira Ohata
• 👤 明 大畠

Bibliographic Details