Engine controller

Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant

Reexamination Certificate

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Details

C123S488000, C123S674000, C060S607000, C701S115000

Reexamination Certificate

active

07991539

ABSTRACT:
An electronic control unit50determines whether the ambient air in the vicinity of an oxygen concentration sensor55in an exhaust passage30has become equal to the atmospheric state as a fuel cut-off operation is executed. If the ambient air in the vicinity of the oxygen concentration sensor55is equal to the atmospheric state, the electronic control unit50executes a learning process, in which a detection value C of the oxygen concentration sensor55is stored as a learned value Cstd in a memory56. The electronic control unit50continues the learning process until a predetermined time period set based on an exhaust gas transport delay elapses from when the fuel cut-off operation is terminated.

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