Boots – shoes – and leggings
Patent
1994-04-11
1996-01-16
Teska, Kevin J.
Boots, shoes, and leggings
60274, 60276, 60277, 60285, 123703, 123688, 123691, 123692, 731181, 36443103, G06G 770, G06F 1900, F01N 300
Patent
active
054853826
ABSTRACT:
An oxygen sensor deterioration-detecting system for an internal combustion engine having a plurality of groups of cylinders groups, an exhaust system having a plurality of exhaust passages extending, respectively, from the cylinder groups, and catalytic converters arranged in the exhaust system, and a plurality of upstream oxygen sensors arranged, respectively, in the exhaust passages at locations upstream of the catalytic converters, includes a single downstream oxygen sensor arranged in a confluent portion of the exhaust passages at a location downstream of the catalytic converters, for detecting the mixed air-fuel ratio of exhaust gases emitted from the cylinder groups. An ECU is responsive to outputs from the upstream oxygen sensors and an output from the downstream oxygen sensor, for determining air-fuel ratio control amounts for respective ones of the cylinder groups, and for controlling the air-fuel ratios of air-fuel mixtures supplied into the respective cylinder groups by the use of the air-fuel ratio control amounts determined. The ECU detects deterioration of each upstream oxygen sensor, based on an output from the upstream oxygen sensor obtained by the air-fuel ratio control based on a corresponding one of the air-fuel ratio control amounts.
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Iida Naoki
Iwata Yoichi
Sato Toshihiko
Seki Yasunari
Honda Giken Kogyo K.K.
Lessler Arthur L.
Louis-Jacques Jacques H.
Teska Kevin J.
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