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:
Jun. 28, 2022
Filed:
Nov. 25, 2019
Applicant:
Aisan Kogyo Kabushiki Kaisha, Obu, JP;
Inventor:
Daisaku Asanuma, Gamagori, JP;
Assignee:
AISAN KOGYO KABUSHIKI KAISHA, Obu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02D 41/18 (2006.01); F02M 25/08 (2006.01); F01M 13/02 (2006.01);
U.S. Cl.
CPC ...
F02M 25/08 (2013.01); F01M 13/022 (2013.01); F02D 41/18 (2013.01); F02D 41/185 (2013.01); F02D 41/187 (2013.01); F02M 25/0809 (2013.01); F02M 25/0827 (2013.01); F01M 2013/027 (2013.01);
Abstract
An evaporated fuel treatment apparatus includes an abnormality determination unit that determines an abnormality of a purge passage. The abnormality determination unit changes an operating cycle of a purge control valve to a cycle longer than an initial set value while maintaining a duty ratio of the purge control valve set according to an operating state of an internal combustion engine, and determines an abnormality of the purge passage based on a first variation range and a second variation range calculated from a detection value detected by an airflow meter before and after the change of the operating cycle.