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:
Aug. 16, 2011
Filed:
May. 23, 2007
Takeshi Iwahashi, Toyota, JP;
Motoki Ohtani, Toyota, JP;
Takeshi Iwahashi, Toyota, JP;
Motoki Ohtani, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Abstract
The ECU executes a program that includes the steps of: calculating the temperature Texp of the wall surface of the exhaust port and the temperature Tsen of the wall surface of the inner cover covering the zirconia element of the A/F sensor (S); heating the zirconia element by the heater (S) when at least one of the condition that the temperature Texp is equal to or higher than the first threshold and the condition that the temperature Tsen is equal to or higher than the second threshold is in effect (S: YES); and prohibiting the heating of the zirconia element by the heater (S) when the temperature Texp is lower than the first threshold and the temperature Tsen is lower than the second threshold (S: NO).