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. 03, 2012
Filed:
Jun. 15, 2010
Hiroki Nishijima, Shizuoka-ken, JP;
Takeshi Hirabayashi, Toyota, JP;
Fumitaka Kato, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Abstract
A method of correcting NOsensor includes the steps of preparing a corrective map in advance, finding an existing proportion of NO or NOin a mixture of NOin exhaust gases before coming into an NOsensor, and correcting an NOconcentration that the NOsensor detects actually. The corrective map records relationships between temperature physical quantities that are relevant to a temperature of the exhaust gases, oxygen-concentration physical quantities that are relevant to an oxygen concentration in the exhaust gases, and the existing proportion. The existing proportion is found with reference to the corrective map using the temperature physical quantities and oxygen-concentration physical quantities that are detected actually. The NOconcentration is corrected on the basis of not only the existing proportion but also a difference between an NOdiffusion velocity and an NO diffusion velocity.