Power plants – Internal combustion engine with treatment or handling of... – Methods
Patent
1986-09-10
1987-11-24
Dolinar, Andrew M.
Power plants
Internal combustion engine with treatment or handling of...
Methods
60276, 60285, 123489, F02D 4114
Patent
active
047079851
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 actual air-fuel ratio is adjusted in accordance with the outputs of the upstream-side and downstream-side air-fuel ratio sensors including an air-fuel ratio correction amount. When a change of an air-fuel ratio correction amount or a change of an air-fuel ratio feedback control parameter calculated in accordance with the output of the downstream-side air-fuel ratio sensor is small, a learning correction amount is calculated so that a mean value of the air-fuel ratio correction amount is brought close to a reference value. The actual air-fuel ratio is further adjusted in accordance with the learning correction amount.
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patent: 4571683 (1986-02-01), Kobayashi et al.
Katsuno Toshiyasu
Masui Takatoshi
Nagai Toshinari
Sato Yasushi
Dolinar Andrew M.
Toyota Jidosha & Kabushiki Kaisha
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