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. 05, 2017
Filed:
Dec. 26, 2013
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Tetsuya Kato, Okazaki, JP;
Shinya Teranishi, Aichi-ken, JP;
Keiichiro Aoki, Shizuoka-ken, JP;
Kazuhiro Wakao, Susono, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, JP;
Abstract
To provide an SOx concentration detection device that can detect the SOx concentration in exhaust gas without using a dedicated sensor. As shown in FIG., the current value that flows when a voltage in the limiting current region is applied stays at a constant value (limiting current value) regardless of the elapsed time. On the other hand, the current value that flows when a voltage in the overcurrent region is applied decreases with the lapse of time and approaches the limiting current value 30 seconds after the start of application of the voltage. In this embodiment, the current value difference is defined as 'SOreduction current,' and the SOconcentration around the sensor is detected from an integrated value of the SOreduction current.