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. 28, 2006
Filed:
Jun. 12, 2003
Mitsuyuki Kobayashi, Gamagori, JP;
Yoshichika Yamada, Kuwana-gun, JP;
Masao Kano, Gamagori, JP;
Kenji Nagasaki, Nagoya, JP;
Mitsuyuki Kobayashi, Gamagori, JP;
Yoshichika Yamada, Kuwana-gun, JP;
Masao Kano, Gamagori, JP;
Kenji Nagasaki, Nagoya, JP;
DENSO Corporation, Kariya, JP;
Abstract
An evaporative emission leak detection system provides for detecting a leakage of a fuel vapor evaporating in a fuel tank by using a pressure difference between an inside and outside of the fuel tank. The system includes a pump for providing the pressure difference between the inside and outside of the fuel tank, a brushless motor for operating the pump, a first passage connecting to the fuel tank, a second passage connecting to the outside of the fuel tank, and a switching device for switching connections between the pump and at least one of the first passage and the second passage. The first passage has an adsorbent for adsorbing the fuel vapor. This system ensures a long life time and high accuracy of the leak detection.