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:
Dec. 08, 2020
Filed:
Oct. 04, 2017
Aisan Kogyo Kabushiki Kaisha, Obu, JP;
Daisaku Asanuma, Gamagori, JP;
AISAN KOGYO KABUSHIKI KAISHA, Obu, JP;
Abstract
A pump module that is mounted in an evaporated fuel processing device configured to perform a purge process in which evaporated fuel in a fuel tank is supplied to an intake passage of an engine through a purge passage. The pump module may include: a pump configured to pump the evaporated fuel in the purge passage to the intake passage; and a pump controller configured to control drive of the pump. The pump controller may be configured to: during the purge process, drive the pump at a rotational speed equal to or lower than a rotational speed threshold until when a predetermined period has elapsed from a start of the purge process; and after the predetermined period has elapsed, drive the pump at a rotational speed equal to or higher than the rotational speed threshold.