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. 02, 2021
Filed:
Feb. 10, 2020
Aisan Kogyo Kabushiki Kaisha, Obu, JP;
AISAN KOGYO KABUSHIKI KAISHA, Obu, JP;
Abstract
A fuel vapor processing apparatus includes an adsorption passage has a first end connected to a fuel tank and a second end open to the atmosphere. The adsorption passage includes a first hollow chamber, a second hollow chamber, and a third hollow chamber. In addition, the adsorption passage includes a first adsorption chamber and a second adsorption chamber. The first adsorption chamber is positioned between the first hollow chamber and the second hollow chamber, and the second adsorption chamber is positioned between the second hollow chamber and the third hollow chamber. The adsorption chambers are configured to adsorb and desorb fuel vapor. A purge passage extends from the second hollow chamber toward an internal combustion engine. A bypass passage extends from the first hollow chamber to the third hollow chamber and bypasses the second hollow chamber. The bypass passage is provided with a shutoff valve that is open during a purge operation and is closed at other times.