Method for controlling engine intake airflow

Details Method for controlling engine intake airflow Method for controlling engine intake airflow

2011-07-12

2011-07-12

Kwon, John T (Department: 3747)

Internal-combustion engines

Charge forming device

C123S321000, C123S345000

Reexamination Certificate

active

07975672

ABSTRACT:
An internal combustion engine includes a controllable throttle and controllable engine valves and is selectively operative in one of a plurality of combustion modes. An engine control method includes monitoring engine operation, determining a desired air flow, estimating a cylinder air charge, and estimating an intake air partial pressure. The throttle control device and engine valves are controlled based upon the intake air partial pressure and the cylinder air charge to achieve the desired air flow.

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“Improved Cylinder Air Charge Estimation for Transient Air Fuel Ratio Control”, J.W. Grizzle, Proceedings of the American Control Conference, Baltimore, MD, Jun. 1994.

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