The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 22, 2019
Filed:
Jul. 26, 2017
Mitsui Mining & Smelting Co., Ltd., Tokyo, JP;
MITSUI MINING & SMELTING CO., LTD., Tokyo, JP;
Abstract
A system () of the invention is a system for detecting deterioration of a catalyst () provided in an exhaust passage () of an internal combustion engine (), the system including: means () that detects a temperature of an exhaust on an upstream side of the catalyst (); means () that detects a temperature of the exhaust on a downstream side of the catalyst (); a recognition unit () that recognizes, both upstream and downstream of the catalyst (), a change point at which the temperature changes from temperature fall or constant temperature to temperature rise during acceleration operation, or a change point at which the temperature changes from temperature rise or constant temperature to temperature fall during deceleration operation; and a determination unit () that determines that the catalyst () has deteriorated when a difference (ΔT or ΔT') between the upstream and downstream change points becomes equal to or longer than a predetermined time.