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:
Feb. 01, 2022
Filed:
Sep. 14, 2020
Aisan Kogyo Kabushiki Kaisha, Obu, JP;
Yuzuru Ito, Chiryu, JP;
Abstract
A leakage detector for a fuel vapor treatment device includes a control unit. The control unit shifts a purge control valve and a shutoff valve to a first state with the purge control valve is an opened position and the shutoff valve in a closed position, and then shifts the purge control valve and the shutoff valve to a second state with the purge control valve is a closed position and the shutoff valve in a closed position. The control unit compares a first purge passage pressure acquired from the purge passage pressure detector when the purge control valve and the shutoff valve were shifted to the second state with a second purge passage pressure acquired from the purge passage pressure detector after a lapse of a first waiting time after being shifting to the second state. This comparison is used to determine leakage in the purge passage.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile