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:
Mar. 09, 2021
Filed:
Feb. 19, 2019
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Aisan Kogyo Kabushiki Kaisha, Obu, JP;
Keita Fukui, Fujinomiya, JP;
Makoto Yamazaki, Gotenba, JP;
Makoto Takano, Suntoh-gun, JP;
Tomohiro Itoh, Susono, JP;
Yoshikazu Miyabe, Obu, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
AISAN KOGYO KABUSHIKI KAISHA, Obu, JP;
Abstract
An evaporative fuel treating apparatus includes: a canister; a vapor passage configured to cause a fuel tank to communicate with the canister; a closure valve including a valve disc arranged in the vapor passage and a stepping motor configured to open and close the valve disc; and a control device configured to control the closure valve. The control device is configured, in opening the valve disc to perform a pressure relief operation of the fuel tank, to: execute a flow rate estimation processing that calculates an estimated flow rate of gas passing through the closure valve, based on the absolute value of the amount of change of in-tank pressure of the fuel tank and a space volume inside the fuel tank; and execute a motor control processing that controls the number of steps of the stepping motor such that the estimated flow rate approaches a required flow rate.