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:
May. 30, 2017
Filed:
Dec. 23, 2013
Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Tokyo, JP;
MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A changeover valve is opened, reference pressure Pb is detected, a monitoring timer is set to 0, a purge process is started, the changeover valve is closed, a pump is operated, and the monitoring timer t is started. Then, a canister internal pressure Pc is detected, a pressure deviation ΔPc is calculated from the reference pressure Pb and the canister pressure Pc, and it is determined if there is abnormality such as a leak or obstruction in a fuel evaporative gas treatment portion when the pressure deviation ΔPc is a first threshold ΔPor higher. It is determined that there is a leak when the pressure deviation ΔPc is less than a second threshold ΔP, and it is determined that there is an obstruction when the pressure deviation ΔPc is the second threshold ΔPor higher.