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:
Nov. 28, 2006
Filed:
Jun. 28, 2005
Yoshinori Inoue, Aichi, JP;
Norikazu Ieda, Aichi, JP;
Masahiro Tanaka, Aichi, JP;
Reina Kito, Nagoya, JP;
Keigo Banno, Aichi, JP;
Tatsuki Hirabayashi, Nagoya, JP;
Yoshinori Inoue, Aichi, JP;
Norikazu Ieda, Aichi, JP;
Masahiro Tanaka, Aichi, JP;
Reina Kito, Nagoya, JP;
Keigo Banno, Aichi, JP;
Tatsuki Hirabayashi, Nagoya, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
An abnormality diagnosis method for a gas concentration measuring device, includes electrically shutting off measurement means from an oxygen concentration detecting cell and an oxygen pump cell of a gas sensor when a voltage at one of electrical connection points through which the measurement means is electrically connected to the oxygen concentration detecting cell and the oxygen pump cell becomes equal to a predetermined abnormal voltage value, and thereafter, electrically connecting the measurement means to the oxygen concentration detecting cell and the oxygen pump cell of the gas sensor to perform an abnormality diagnosis of the gas sensor. An abnormality diagnosis apparatus for a gas concentration measuring device is also provided.