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:
Sep. 14, 2021
Filed:
May. 15, 2018
Aisan Kogyo Kabushiki Kaisha, Obu, JP;
Makoto Nakagawa, Nagoya, JP;
AISAN KOGYO KABUSHIKI KAISHA, Obu, JP;
Abstract
An evaporated fuel processing device includes a canister to which evaporated fuel generated in a fuel tank adheres; a purge passage passed through purge gas and connecting the canister and an intake pipe of an engine; a purge control valve provided on the purge passage and controlling a supply amount of the purge gas to the intake pipe by changing a duty cycle; a pump provided on the purge passage and feeding the purge gas from the canister to the intake pipe; and a controller control the duty cycle of the purge control valve. The controller detects a pressure difference between pressures at upstream and downstream ends of the purge passage while the purge gas is supplied, and corrects the duty cycle based on a supply amount of the purge gas with respect to the duty cycle with no influence of the pump, by using the detected pressure difference.