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:
Sep. 13, 2010
Filed:
Dec. 19, 2006
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;
Makoto Miwa, Kariya, JP;
Denso Corporation, Kariya, JP;
Abstract
A fuel vapor control system has a controller that carries out a leak check processing after the engine is stopped. The controller includes a device that intermittently activates the controller itself or a part of the controller to sample an internal pressure of the fuel vapor passage. Then, after a predetermined time, the controller determines that whether the sampled values of the internal pressure indicate a leak or not by evaluating the sampled values. According to the arrangement, since at least a part of the controller is activated intermittently, the consumption of electricity can be reduced. The fuel vapor control system has a canister valve and a purge valve made of normally close type valves in order to reduce the consumption of electricity after the engine is stopped.