Method and system for diagnosing deterioration of exhaust emission control catalyst
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 16, 2019
Grant Date -
Sep 3, 2015
app pub date -
Feb 9, 2015
filing date -
Feb 28, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method of diagnosing deterioration of an exhaust emission control catalyst is provided. The catalyst includes an HC (hydrocarbon) adsorbing part and an oxidation catalyst part. The method includes estimating that an HC discharge amount discharged from the HC adsorbing part is larger than a first value, detecting a parameter relating to a reaction heat of the exhaust emission control catalyst, and diagnosing that the exhaust emission control catalyst is deteriorated when the detected parameter indicates a temperature value lower than a predetermined threshold. The deterioration diagnosis is performed under a first condition that the HC discharge amount is estimated to be larger than the first value.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully