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:
Feb. 26, 2013
Filed:
Sep. 01, 2010
Satoshi Sugaya, Aichi, JP;
Shiro Kakimoto, Aichi, JP;
Tetsuo Yamada, Aichi, JP;
Wataru Matsutani, Aichi, JP;
Takio Kojima, Aichi, JP;
Satoshi Sugaya, Aichi, JP;
Shiro Kakimoto, Aichi, JP;
Tetsuo Yamada, Aichi, JP;
Wataru Matsutani, Aichi, JP;
Takio Kojima, Aichi, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A method and apparatus for controlling a multi-gas sensor, including an NOsensor section and an ammonia sensor section. The NOsensor section includes a first pumping cell adapted to pump oxygen into or out of a gas under measurement introduced into a first measurement chamber, and a second pumping cell communicating with the first measurement chamber and configured such that a second pumping current Ipcorresponds to an NOconcentration of the gas under measurement. Oxygen concentration is calculated on the basis of a first pumping current flowing through the first pumping cell, and a corrected ammonia concentration is calculated on the basis of the oxygen concentration and the ammonia concentration output of the ammonia sensor section.