CONTROLLER FOR INTERNAL COMBUSTION ENGINE

Title:

CONTROLLER FOR INTERNAL COMBUSTION ENGINE

Document Type and Number:

Japanese Patent JP2005002813

Kind Code:

A

Abstract:

To provide a controller for an internal combustion engine capable of accurately determining failure of an oxygen concentration sensor attached to the internal combustion engine switching partial cylinder operation and whole cylinder operation.

Failure of the oxygen concentration sensor is diagnosed in a predetermined operation condition including a fuel supply shut-off operation condition for shutting off fuel supply to the internal combustion engine. Partial cylinder operation is permitted (S25) on condition that failure diagnosis of the oxygen concentration sensor ends (S23) and it is determined that the oxygen concentration sensor is normal (S24) as a result of the diagnosis. Consequently, failure diagnosis of the oxygen concentration sensor is performed during whole cylinder operation to perform accurate diagnosis.

Inventors:

SEGAWA MAKOTO
YAMADA HARUHIKO
AMANO MASATO
TAMURA YUICHI

Application Number:

JP2003164754A

Publication Date:

January 06, 2005

Filing Date:

June 10, 2003

Export Citation:

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Assignee:

HONDA MOTOR CO LTD

International Classes:

F02D45/00; F02D17/02; F02D41/00; F02D41/14; F02D41/36; F02D41/12; (IPC1-7): F02D17/02; F02D45/00

Attorney, Agent or Firm:

Koji Arai

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