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:
Jul. 24, 2007
Filed:
Dec. 07, 2005
Masao Kano, Gamagori, JP;
Shinsuke Takakura, Kariya, JP;
Noriyasu Amano, Gamogori, JP;
Sinsuke Kiyomiya, Seto, JP;
Yuusaku Nishimura, Toyota, JP;
Masao Kano, Gamagori, JP;
Shinsuke Takakura, Kariya, JP;
Noriyasu Amano, Gamogori, JP;
Sinsuke Kiyomiya, Seto, JP;
Yuusaku Nishimura, Toyota, JP;
Nippon Soken, Inc., Nishio, Aichi-pref., JP;
DENSO Corporation, Kariya, Aichi-pref., JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, Aichi-pref., JP;
Abstract
A fuel vapor processing apparatus includes a canister, a purge passage, a detection passage including an atmosphere passage and a restrictor, a passage changing valve for changing the connection passage of the detection passage between the purge passage and the atmosphere passage, a pump connecting with the detection passage on the opposite side of the passage changing valve across the restrictor, a pressure sensor for detecting a pressure between the restrictor and the pump, and an ECU for computing the concentration of fuel vapor. When the passage changing valve causes the purge passage to connect with the detection passage and the pump reduces pressure in the detection passage to pass the air-fuel mixture through the restrictor, the pressure sensor detects the pressure during a detection period of time that elapses after the air-fuel mixture passes through the restrictor until the air-fuel mixture reaches the pump.