Power plants – Internal combustion engine with treatment or handling of... – Methods
Patent
1988-02-05
1989-11-21
Dolinar, Andrew M.
Power plants
Internal combustion engine with treatment or handling of...
Methods
60276, 60285, 123489, F02D 4114, F01N 320
Patent
active
048813680
ABSTRACT:
In a double air-fuel sensor system including two air-fuel ratio sensors upstream and downstream of a catalyst converter provided in an exhaust gas passage, an air-fuel ratio correction amount is calculated in accordance with the outputs of the upstream-side and downstream-side air-fuel ratio sensors, thereby obtaining an actual air-fuel ratio. When all of the feedback control conditions for the downstream-side air-fuel ratio sensor are satisfied, a speed of renewal of the air-fuel ratio correction amount in accordance with the output of the downstream-side air-fuel ratio sensor is lowered before the output of the downstream-side air-fuel ratio sensor is reversed or for a predetermined time period.
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Demura Takayuki
Igarashi Kohei
Dolinar Andrew M.
Toyota Jidosha & Kabushiki Kaisha
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