Internal-combustion engines – Charge forming device – Including exhaust gas condition responsive means
Reexamination Certificate
2006-12-12
2006-12-12
Solis, Erick R (Department: 3747)
Internal-combustion engines
Charge forming device
Including exhaust gas condition responsive means
C123S685000, C123S688000, C073S023320, C701S109000
Reexamination Certificate
active
07146972
ABSTRACT:
An air fuel ratio control system includes an exhaust gas sensor to sense an oxygen concentration in an exhaust passage of an internal combustion engine, and a controller. The controller is configured to judge that the exhaust gas sensor is in an active state, by monitoring a decrease of an output of the exhaust gas sensor from a level greater than a first predetermined value, to a level smaller than or equal to the predetermined first predetermined value, and to allow the air fuel ratio control when the exhaust gas sensor is judged to be in the active state.
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Hitachi , Ltd.
Solis Erick R
Sughrue & Mion, PLLC
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