Fuel control method and system with on-line learning of open-loo

Details Fuel control method and system with on-line learning of open-loo Fuel control method and system with on-line learning of open-loo

1996-11-18

1998-04-28

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

F02D 4100, F02M 2300

Patent

active

057432449

ABSTRACT:
A method and system for fuel delivery to an engine (400) measures when an exhaust gas sensor (413) is in a non-lit-off condition and when the exhaust gas sensor is in a lit-off condition. A control device (409) estimates fuel puddle dynamics for an intake system of the engine when the exhaust gas sensor is in the lit-off condition, and adapts (511) an open-loop fuel parameter table (229) dependent on the estimated fuel puddle dynamics. The control device (409) adjusts fuel delivery to the engine dependent on the fuel puddle dynamics when the exhaust gas sensor is in the lit-off condition, and adjusts fuel delivery to the engine dependent on the open-loop fuel parameter table (229) when the exhaust gas sensor is in the non-lit-off condition.

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"Real Time Engine Control Using STR in Feedback System" by Maki, Akazaki, Hasegawa, Komoriya, Nishimura and Hirota, Honda R&D Co., Ltd. 1995.
"Adaptive Air-Fuel Ratio Control of a Spark-Ignition Engine" by Ault, Jones, Powell, and Franklin, Stanford University, 1994.
"An Adaptive Fuel Injection Control with Internal Model in Automotive Engines" by Inagaki, Ohata, and Inoue, Toyota Motor Corporation.

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