Internal combustion engine controller

Details Internal combustion engine controller Internal combustion engine controller

2006-07-27

2008-05-06

Wolfe, Jr., Willis R. (Department: 3747)

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

C123S703000

Reexamination Certificate

active

07367330

ABSTRACT:
The internal combustion engine controller includes an oxygen concentration sensor outputting an electric signal having a value depending on an oxygen concentration in an exhaust gas flowing through an exhaust passage of an internal combustion engine, and a control unit controlling fuel injection amount depending on at least the electric signal, the control unit being capable of performing atmospheric learning to calibrate the oxygen concentration sensor. The control unit is configured to perform the atmospheric learning when a changing rate of the value of the electric signal is lowered from above a predetermined threshold rate to below the predetermined threshold rate after a time of start of cutoff of fuel supply to the engine.

REFERENCES:
patent: 4347821 (1982-09-01), Saito
patent: 4365604 (1982-12-01), Sone
patent: 4430191 (1984-02-01), Sone et al.
patent: 4841940 (1989-06-01), Uranishi et al.
patent: 4898143 (1990-02-01), Fujimoto et al.
patent: 2003-003903 (2003-01-01), None

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