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. 10, 2015
Filed:
Jan. 16, 2012
Yusaku Nishimura, Toyota, JP;
Yoshihide Ogawa, Toyota, JP;
Kazuhiro Minamitani, Toyota, JP;
Satoshi Kawai, Toyota, JP;
Toshio Douke, Toyota, JP;
Yoshinori Ogaki, Toyota, JP;
Yusaku Nishimura, Toyota, JP;
Yoshihide Ogawa, Toyota, JP;
Kazuhiro Minamitani, Toyota, JP;
Satoshi Kawai, Toyota, JP;
Toshio Douke, Toyota, JP;
Yoshinori Ogaki, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
An evaporation system leak diagnostic apparatus that purges fuel vapor from a fuel tank into an intake system of an internal combustion engine via a canister, includes: a first closed system leak diagnostic unit that executes a leak diagnostic on a first closed system based on a tank internal pressure detected by a tank internal pressure detecting device while the first closed system is formed with a first closed system forming device; and a second closed system leak diagnostic unit that introduces pressure in the first closed system into a second closed system by forming a second closed system with a second closed system forming device, and executes a leak diagnostic on the second closed system based on the tank internal pressure detected by the tank internal pressure detecting device, after the leak diagnostic by the first closed system leak diagnostic unit.