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:
Oct. 18, 2010
Filed:
May. 16, 2007
Makoto Miwa, Kariya, JP;
Syujiro Morinaga, Takahama, JP;
Yoshinori Maegawa, Obu, JP;
Keiji Wakahara, Inazawa, JP;
Makoto Miwa, Kariya, JP;
Syujiro Morinaga, Takahama, JP;
Yoshinori Maegawa, Obu, JP;
Keiji Wakahara, Inazawa, JP;
DENSO Corporation, Kariya, JP;
Abstract
A leak check system executes a leak check processing. In the leak check processing, the system closes a canister valve and a purge valve to close the fuel vapor purge system. Then, the system detects and monitors a pressure in the fuel vapor purge system. During the leak check processing, the system detects a rapid change of the pressure that is caused by a deformation of a wall of a fuel tank. The system cancels or suspends the processing to avoid erroneous detection of the leak. If the leak check is canceled, the system opens the canister valve to open the fuel vapor purge system.