CATALYST CAPACITY DETECTION DEVICE

Title:

CATALYST CAPACITY DETECTION DEVICE

Document Type and Number:

Japanese Patent JP2023175080

Kind Code:

A

Abstract:

To determine capacity of a catalyst while suppressing increase in toxic substances in an exhaust gas.SOLUTION: A catalyst capacity detection device 10 includes: a catalyst 31 disposed in an exhaust passage 3 of an internal combustion engine 1 and having oxygen storage capacity; and an A/F sensor 32 disposed downstream from the catalyst 31 in the exhaust passage 3 to detect an oxygen concentration of an exhaust gas corresponding to an air-fuel ratio of a combustion chamber of the internal combustion engine 1. The catalyst capacity detection device calculates an inclination in correlation between the oxygen concentration and an oxygen density change speed from a value of the oxygen concentration detected by the A/F sensor 32 and determines capacity of the catalyst from the change of the inclination.SELECTED DRAWING: Figure 1

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Inventors:

MASUBUCHI MASAHIKO
KOBAYASHI MASARU
AOKI KEIICHIRO
MORI TOSHIHIRO

Application Number:

JP2022087342A

Publication Date:

December 12, 2023

Filing Date:

May 30, 2022

Export Citation:

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Assignee:

TOYOTA MOTOR CORP

International Classes:

F01N3/20; F01N11/00

Attorney, Agent or Firm:

Patent Attorney Corporation YKI International Patent Office

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