F - Mech Eng,Light,Heat,Weapons – 01 – N
Patent
F - Mech Eng,Light,Heat,Weapons
01
N
F01N 9/00 (2006.01) F01N 11/00 (2006.01)
Patent
CA 2142744
An exhaust purification device includes a catalytic converter for purifying exhaust gas from an engine, air-fuel ratio sensors provided on the upstream side and downstream side of the catalytic converter, respectively, for detecting the concentration of a specific component in the exhaust gas, a control device for processing the output of the air-fuel ratio sensors and generating a signal based on the processed output, and a catalyst degradation warning device which operates according to the signal generated by the control device for warning an operator of a degraded catalyst, where the responsiveness of the downstream side air-fuel ratio sensor is lower than the responsiveness of the upstream side air-fuel ratio sensor.
Fukaya Kenji
Hamaya Masahiro
Hayashi Kazuo
Hori Makoto
Ohta Minoru
Fetherstonhaugh & Co.
Nippondenso Co. Ltd.
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