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. 18, 2020
Filed:
Feb. 02, 2017
Aisan Kogyo Kabushiki Kaisha, Obu-shi, JP;
Daisaku Asanuma, Gamagori, JP;
Nobuhiro Kato, Tokai, JP;
AISAN KOGYO KABUSHIKI KAISHA, Obu-Shi, JP;
Abstract
An evaporated fuel processing device including a purge passage through which a purge gas sent from a canister to an intake passage passes, a pump sending the purge gas to the intake passage, a control valve switching between a communication state and a cutoff state, a branch passage branching from the purge passage at an upstream end and joining the purge passage at a downstream end, a pressure specifying unit comprising a small diameter portion disposed on the branch passage, and specifying a pressure difference of the purge gas passing through the small diameter portion between an upstream side and a downstream side, and an estimation unit estimating a flow rate of the purge gas sent from the pump by using an evaporated fuel concentration in the purge gas that is estimated using an air-fuel ratio and the pressure difference.