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:
Jan. 15, 2008
Filed:
Apr. 06, 2006
Masao Kano, Gamagori, JP;
Shinsuke Takakura, Kariya, JP;
Tomoaki Nakano, Nagoya, JP;
Noriyasu Amano, Gamagori, JP;
Shinsuke Kiyomiya, Seto, JP;
Yuusaku Nishimura, Toyota, JP;
Masao Kano, Gamagori, JP;
Shinsuke Takakura, Kariya, JP;
Tomoaki Nakano, Nagoya, JP;
Noriyasu Amano, Gamagori, JP;
Shinsuke Kiyomiya, Seto, JP;
Yuusaku Nishimura, Toyota, JP;
Denso Corporation, Kariya, Aichi-pref., JP;
Nippon Soken, Inc., Nishio, Aichi-pref., JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, Aichi-pref., JP;
Abstract
A fuel vapor treatment apparatus includes a first canister, a purge passage, an atmosphere passage, a first detection passage provided with a restrictor, and a passage-changing valve for changing the connection passage of the first detection passage between the purge passage and the atmosphere passage. The apparatus further includes a second canister connecting with the first detection passage on the opposite side of the passage-changing valve across the restrictor. A differential pressure sensor detects a pressure difference between both ends of the restrictor. An ECU computes the concentration of fuel vapor on the basis of the detection result of the differential pressure sensor.